SEA: Space Exploration & Astronomy
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52 afleveringen, van nieuw naar oud
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The REAL Largest Star
25 oktober 2026 · 30 min
What is the largest star, and where can it be found? For a few years now, it has been known as Stephenson 2-18, often claimed to boast a diameter more than 2,100 times our sun’s. But is this estimate really reliable? And if not, then what other giant stars may be lurking out there? These are the questions we will be aiming to answer as we wind back the clock in search of the real “largest star”. Lees meer
MUSIC:
- Holographic Rain - CO.AG Music (https://www.youtube.com/watch?v=37aEn7yuChQ)
- Strange Visions (Giuseppe Rizzo)
- Endless Mist (Enzo Orefice)
- Dystopia - Instrumental (Efliz)
- Nights of Darkness 01 - CO.AG Music (https://www.youtube.com/watch?v=FwC9HZv7Zw0)
- Static Balance (Enzo Orefice)
- Agnus Dei (Michele Nobler)
- Light the Way (Enzo Orefice)
Artists:
- Enzo Orefice: https://www.music-bay.net/artists/enzo-orefice/
- CO.AG’s music channel: https://www.youtube.com/@co.agmusic
CHAPTERS:
00:00: What is the Largest Star?
01:48: It’s Not Stephenson 2-18
05:20: Modern-day Contenders
11:30: Primordial Stars
15:47: Quasi-Stars
18:11: MoM BH*-1: Webb’s New Black Hole Star
22:28: A Source of Galactic Engines?
26:20: The REAL “Largest Star”
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Journey to the Gas Giants (Probes Episode #2)
11 oktober 2026 · 44 min
Far beyond the reaches of the four rocky planets, we find our Solar System's showpiece worlds- the two gas giants, Jupiter and Saturn. As the two largest planets, they both make tantalising targets for probes exploring the planetary neighbourhood, but both lie significantly further from the sun than the Earth and its terrestrial neighbours. But early in the 1970s, the technology for deep space voyages was primed, and missions to both Jupiter and Saturn ensued. Those missions make up the topic of our video today, in this second episode of our trilogy of Probes that Studied the Solar System. Lees meer
CHAPTERS:
00:00: Welcome Back
01:52: The Gas Giants
04:11: When Planets Align
08:15: Pioneer 10's Journey to Jupiter
12:46: Pioneer 11's Jupiter Journey
15:10: Pioneer 11's Saturn Encounter
16:59: A Postcard from Humanity
18:46: The Galileo Spacecraft
24:27: Cassini-Huygens Spacecraft
29:11: Landing on Titan
32:14: Enceladus' Underground Ocean
33:55: Other Studies: Rings & Storms
36:52: Cassini's Grand Finale
38:38: Future Missions to the Gas Giants
42:33: To be Continued...
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The God Particle
4 oktober 2026 · 37 min
In 2012, the world’s most advanced science experiment uncovered the signature of the Higgs Boson, the so-called “God Particle” which gives particles their masses. The Higgs was the last of the Standard Model's particles to be verified experimentally. But far from closing the case, it instead opened a new frontier in physics that today embodies everything we still don’t know about nature’s smallest scales. And so in this video, we will wind back the clock more than half a century, to unravel the history and mysteries of the elusive Higgs Boson. Lees meer
SOUNDTRACK:
- “Adega” - CO.AG Music (https://www.youtube.com/watch?v=V2faIhMd5GY)
- “Cold Constellations” - Enzo Orefice
- “No Eyes in the Fog” - Enzo Orefice
- “Creepy Dolls” - Efliz
- “Vanished Minds” - CO.AG Music (https://www.youtube.com/watch?v=YPQM8Twz5ec)
- “Orbiting Dreams” - Enzo Orefice
- “Sunrise” - Enzo Orefice
- “Parallel Dimensions” - Enzo Orefice
- “Hidden Presence” - Enzo Orefice
- “I Vanish When the Sun Awakens” - CO.AG Music (https://www.youtube.com/watch?v=T5fLFlAI0Fw)Artists:
- Enzo Orefice: https://www.music-bay.net/artists/enzo-orefice/
- CO.AG Music: https://www.youtube.com/@co.agmusic/videos
CHAPTERS:
00:00: The Standard Model
01:58: The Higgs Field
04:53: The Weak Force Problem
08:12: Early Particle Colliders
12:14: The Large Hadron Collider
14:04: Detecting the Higgs Particle
18:31: Sigma Significance
20:23: Discovery in 2012
23:26: Naturalness vs. Fine Tuning
27:01: Supersymmetry
29:54: Future Colliders
32:05: Vacuum Decay
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What Does it All Mean?
27 september 2026 · 33 min
Why does the universe choose life over silence? Why has its once inanimate matter and energy come alive on planet Earth? Is it chance? Fate? Or even, by design? It is this profound question that has plagued our conscious minds since the time of our earliest ancestors, and it is going to be the topic of our video today. Lees meer
This video is my oldest idea, and I was planning for it as early as 2021. A massive thank you to the artist Semiquaver for composing the soundtrack that brought this vision to life.
SOUNDTRACK:
The soundtrack for this video was crafted by Semiquaver, an ambient music and soundscape artist who I'd been following for a while, and knew he was perfect for the job.
His channel can be found here: @semiquaver16th , where he regularly releases new soundscapes and compositions.
The full, 37 minute track will be available to listen to here: https://youtu.be/WQQhwggE6Bo
CHAPTERS:
0:00: What Does It Mean?
1:55: Cosmic Fine-Tuning
7:22: The Universe is Infinite
10:45: Parallel Universes
14:47: Design Hypothesis
18:56: Cosmic Consciousness
22:02: Boltzmann Brain
25:03: We Are Alone
28:30: Theory of Everything
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How Time Works in Space
20 september 2026 · 27 min
Can we ever turn back the clock? On Earth, Time is rigid and immovable, but in space, it's practically the opposite. Out in the cosmos, time is another dimension alongside the three of space- but unlike in 3D space, there is only one way we seem to be able to move through time. The cause of this directionality, and so-called "Arrow of Time" through the cosmos, makes up the topic of our video today- the second part in a double header on the mysterious workings of Time. Lees meer
SOUNDTRACK:
The first and last tracks in this video were composed by Semiquaver, an ambient soundscape music artist. He and I will be working on an original piece specially for the soundtrack to my final video of the year, so go and check him out before then: @semiquaver16th
The other tracks were composed by CO.AG Music, my go-to-guy for such high quality pieces: @co.agmusic
"Why Me?" - Semiquaver: https://youtu.be/kfp-Qm99BTY?si=ZOUiOTxLgpkHgWhd
"Space is as Clear as Dreaming" - CO.AG Music: https://youtu.be/FQ42GG9ReC4?si=ceWagFlaEY3qOiuH
"You Can Escape Everything in This Life Except Yourself" - CO.AG Music: https://youtu.be/O58i-jHGYVs?si=mSBKH-WITwGaLV1z
"Old Tape Haunting Soundscape" - CO.AG Music: https://youtu.be/LT_APDKFEjU?si=M7h8OTIyC5QtV0Px
"I Will Awaken When the Sun Sleeps" - CO.AG Music: https://youtu.be/IshEmQXBi7g?si=mzCVDnGXV28K0Tzp
CHAPTERS
00:00: Welcome Back...
01:56: The Fourth Dimension
06:28: Time Dilation
11:15: Forward Time Travel
12:42: General Relativity
15:00 Backwards Time Travel
18:38: The Second Law
21:49: Reverse Entropy
23:48: Out of Time
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The History of Time
13 september 2026 · 32 min
Tick. Tock. It's a sound you probably hear several times a day. Time dominates virtually every aspect of our lives, attuned to the rigid, unflinching regularity of Hours, Minutes and Seconds. The question how did our ancient ancestors figure out these units? Who came up with the concepts of timekeeping, like Minutes and Seconds, and why are there 60 of them, and not say, 100? The answers to such questions make up the topic of our video today- the first in a two-part series on the mysterious workings of Time. Lees meer
Tick. Tock. It's a sound you probably hear several times a day. Time dominates virtually every aspect of our lives, attuned to the rigid, unflinching regularity of Hours, Minutes and Seconds. The question how did our ancient ancestors figure out these units? Who came up with the concepts of timekeeping, like Minutes and Seconds, and why are there 60 of them, and not say, 100? The answers to such questions make up the topic of our video today- the first in a two-part series on the mysterious workings of Time. This one was both a challenge and a privilege to work on, Part 2 will be released towards the end of the month and will be... different. Join my Discord Server: https://discord.com/invite/seaMerchandise: https://the-sea-store.creator-spring.comContent Disclaimer:All the content in this video was researched, written up, narrated and then put together by me (Sam). I do this as a full time job because I enjoy it. I do not use AI for any part of my creative process, and my voice is my personal property and not authorised to be replicated anywhere else. You can support the channel on Patreon: https://www.patreon.com/sea_mediaPatrons get early access to new videos and sneak peeks, as well as ad-free access to existing episodes!SOUNDTRACK (In order of appearance):
“Hologram” - CO.AG Music (https://www.youtube.com/watch?v=uPFkyyslcb4)
“Lost in the Motions of Time” - The Turquoise Moon
“Do Not Enter: Horror Background” - The Turquoise Moon
“Eyes of Quartz & Obs…
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Leviathans: Giant Creatures of the Deep Sea
6 september 2026 · 32 min
Aliens. They already roam this planet, but not on its surface or in the skies. Rather, they lie at the crushing depths of the vast, sprawling oceans. And so in this episode, we'll be swapping the familiar frontier of space for that of the deep ocean, as we plunge into the abyss in search of Leviathans- massive, monstrous marine specimens that have stalked the high seas for almost half a billion years. Lees meer
SOUNDTRACK:
Many of the tracks in this video were composed by CO.AG Music, my go-to-guy for such high quality pieces
"Someone Else's Problems" - CO.AG Music (https://www.youtube.com/watch?v=EQp7YuV-leM)
"Centeon Dreams" - CO.AG Music (https://www.youtube.com/watch?v=B_fyyuO5ZZE)
"Forbidden Apostle" - CO.AG Music (https://www.youtube.com/watch?v=DB9ybYQoKu4)
"The Anunnaki Return" - Jesse Gallagher (YouTube Audio Library)
"Choose Your Next Move" - CO.AG Music (https://www.youtube.com/watch?v=abm56ceJi6Y)
"Ocean Breath" - Enzo Orefice (StoryBlocks Media)
"Echoes of the Unknown" - CO.AG Music (https://www.youtube.com/watch?v=Ir8r9k0L0HA)
CHAPTERS:
00:00: Aliens of the Deep
01:36: Leviathan Sea Serpents
06:04: Megalodon: The Megatooth Shark
09:32: Marine Reptiles
13:07: Prehistoric Whales
17:55: The Blue Whale: Largest Creature Ever
21:07: The Bloop: Larger than a Blue Whale?
23:46: Invertebrate Deep Sea Giants
28:12: Siphonophores
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Antarctica: The Alien Continent
30 augustus 2026 · 32 min
On the dark, secluded underside of our planet, we find its most alien continent, Antarctica. A frozen desert larger than Europe, lying atop a sheet containing more than 90% of the world’s ice. But buried beneath this frosty surface, lie fossils and relics from an age where Antarctica was wildly different- covered not by ice, but by forests of trees. Lees meer
SOUNDTRACK:
"Black Star" - Lustmord
Song: https://lustmord.bandcamp.com/track/black-star
Artist: https://lustmord.bandcamp.com
“Frozen in Darkness, the Shadowed Halls Underscore” - CO.AG
‘Futuristic Alien Videogame Music” - StoryBlocks Media
“Incredulity” by Scott Buckley (Creative Commons 4.0 International License):
Song: https://www.scottbuckley.com.au/library/incredulity/
Artist: https://www.scottbuckley.com.au/library/
“Frozen City, Mysterious Fantasy Orchestra” - StoryBlocks Media
“If you love me” - CO.AG Musichttps://www.youtube.com/watch?v=jq1FJ_S73tg
“This Machine Managed to Trick Time” - CO.AG Musichttps://www.youtube.com/watch?v=AxQtQJ8wiyQ
“Delay Time” - CO.AG Musichttps://www.youtube.com/watch?v=2JVunbxm1MI
“Mysterious Darkness, Reveal Fear” - StoryBlocks Media
CHAPTERS:00:00: The Seventh Continent
03:48: The Southern Ocean
05:55: The Great Ice Sheet
07:14: West Antarctica
09:21: East Antarctica
11:52: Gondwana: Antarctica’s Past
15:38: Ross Island
16:44: Race to the South Pole
19:34: Little America Bases
21:37: McMurdo Station
23:53: Alien Environments in Antarctica
28:36: The Doomsday Glacier
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Before Pangea: The Supercontinents
23 augustus 2026 · 35 min
Long ago, the Earth's seven continents were assembled in a giant, sprawling supercontinent known as Pangea. You may've heard of it, but what is often less talked about is what came before. Our planet's current continental chunks have been smashing together and separating for over four billion years, and there have been more than a few "supercontinents" during that time. It is those lost lands that take the stage in this video, as we wind the clock back to the age of the Supercontinents before Pangea. Lees meer
BACKGROUND MUSIC: (In order of appearance)
- Meanwhile | Scott Buckley: https://www.scottbuckley.com.au/library/meanwhile/
- Ambient Cave | Storyblocks
- Everyone Parts with Everything Eventually | CO.AG Music: https://youtu.be/obyY4n352to?si=eY6KSlBPlWEXcRH8
- Dream a Silent Journey | Storyblocks
- Ambient Strings and Solo Cello for Meditation | Storyblocks
- Lost in Place | Storyblocks
- Time Drift | CO.AG Music: https://www.youtube.com/watch?v=4tQiFbOhHBY&t
- The Disappearance | CO.AG Music: https://www.youtube.com/watch?v=MLjXuckODT8
- Lost at Sea | Storyblocks
- Ascension | Storyblocks
CO.AG Music's Channel: https://www.youtube.com/@co.agmusic
Scott Buckley’s track can be found on his website – released under CC-BY 4.0. www.scottbuckley.com.au
CHAPTERS:
00:00: The Supercontinent Cycle
02:53: Plate Tectonics & Forming Land
05:57: Cratons
08:35: Vaalbara
10:48: Ur
14:03: Kenorland
17:52: Arctica / Atlantica / Nena
20:46: Columbia (a.k.a. "Nuna")
23:35: Rodinia
29:05: Gondwana / Laurasia
31:22: Pangea
34:13: Pangea Proxima?
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You Are Here
16 augustus 2026 · 44 min
As rich and life-supporting as the Earth is today, it was once nothing more than a column of dust, dancing in a scorched cyclone of gas. And just how we as humans managed to emerge from this ancient dust makes up the topic of this video today. So join us, as we wind the cosmic clock backwards almost five billion years, from you and I in the present, all the way back to the birth of the solar System, back to when Earth was nothing more than a burning, barren wasteland. Lees meer
SOUNDTRACK:
The music in this video was created by Scott Buckley and CO.AG Music, their respective tracks are listed below:
Scott Buckley Creative Commons Music: https://www.scottbuckley.com.au/library/
- Undertow: https://www.scottbuckley.com.au/library/undertow/
- Moonlight: https://www.scottbuckley.com.au/library/moonlight/
- Machina: https://www.scottbuckley.com.au/library/?s=machina
- This Too Shall Pass: https://www.scottbuckley.com.au/library/this-too-shall-pass/
- Celestial: https://www.scottbuckley.com.au/library/celestial/
- She Moved Mountains: https://www.scottbuckley.com.au/library/she-moved-mountains/
CO.AG Music: https://www.youtube.com/@co.agmusic1823
- Lufian Sky (CO.AG): https://youtu.be/LLmuc12sS7g
- Dim Light Documentary Music (CO.AG): https://youtu.be/DKV7Lfda2NM
- Lost Time Edit Mix (CO.AG): https://youtu.be/18R8o8J7GMU
- Dream That Summer Dream (CO.AG): https://youtu.be/5jARlSfkVv4
- Another Time, Another Space, Another Place (CO.AG): https://youtu.be/kABg8lGVo28
CHAPTERS:
00:00: Welcome
01:36: Formation of Earth
05:41: Hydrothermal Vents
07:57: The First Lifeforms
10:24: Great Oxidation Event
13:21: Eukaryotes
14:52: Multicellular Lifeforms
19:06: Early Cambrian Creatures
21:21: The Age of Fish
24:54: The First Amphibians
27:24: Pangaea: The Supercontinent
30:40: The Great Die-Off
33:38: The Rule of Dinosaurs
36:16: The Asteroid Extinction
39:10: First Humans
42:09: Closing Statements
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You Live in a Supervoid
9 augustus 2026 · 32 min
Do we live in a cosmic void? It might sound like an odd question, but it’s something scientists have debated for decades. Does the Milky Way exist in a region of low cosmic density which is warping our view of the local universe as a result? The answer goes far deeper than you probably realise- and it’s just one of the many perplexing mysteries we’ll be diving into during this video, where voids and supervoids take centre stage. Lees meer
SOUNDTRACK:
The music tracks in this video were composed by Enzo Orefice, a royalty-free music creator. In order of appearance they are:
- “Psyconaut”
- “Submerged In Silence”
- “Borealis Glow”
- “Timeless Flow”
- “Void Waves”
- “Stellar Winds”
Artist: https://www.music-bay.net/artists/enzo-orefice/
CHAPTERS:
00:00: You Live in a Supervoid
05:55: The Local Void
09:22: Boötes Void
12:06: The Dipole Repeller
15:54: The Mystery of the Cold Spot
23:12: Evolving Dark Energy
28:51: Future Efforts to Study Voids
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Engine Black Holes: The Most Massive Objects in the Universe
2 augustus 2026 · 30 min
Lying at the cores of most large galaxies, do we find the “largest” type of object in the universe- a supermassive “engine” black hole. They almost always have masses many millions of times that of the sun, while the biggest grow to tens of billions. Exactly what was responsible for seeding these great engines, and building up their immense sizes, is a challenge only the James Webb Telescope can rise to. Lees meer
MUSIC:
The majority of tracks in this video are royalty-free tracks from Storyblocks. Exceptions are listed.
- The Second One | Enzo Orefice
- Falling | Elfiz
- Haunting Atmospheric Si-Fi Sounds… | Gerardo Garcia Jr
- Meditation Vibes | Sleeping Ghost
- Voice | Elfiz
- Incarnation | Scott Buckley Scott Buckley’s track can be found on his website: https://www.scottbuckley.com.au/2024/10/new-library-track-incantation/
CHAPTERS:
00:00: The Most Massive Objects
01:48: The Cosmic Dawn
05:33: Primordial Black Holes
07:02: Direct Collapse
09:07: Distant Supermassive Black Holes
13:35: Webb Telescope’s Findings
16:34: The Biggest Black Holes
21:31: The Distant Future
23:12: The End of the Universe
25:13: Hawking Radiation
28:22: Exploding Black Holes!
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Lost Worlds in the Dark
26 juli 2026 · 32 min
Laced within the cold, desolate swathes of the space between stars, lie myriad orphaned planets not tethered to a particular system. They are lost worlds floating in the dark, and there are likely tens of billions in the Milky Way galaxy alone. Today, we will journey through the galaxy in search of these lost worlds in the darkness of interstellar space, and sometimes even, intergalactic space. Lees meer
SOUNDTRACK (In order of appearance):
- Guided Meditation | Jon Presstone
- A Creepy Atmospheric | Unknown, Storyblocks Media
- Alkaidia Obscured Calls | Bzur
- Curve | CO.AG Music (https://youtu.be/3uYCzfzmh68?si=3fRFV9NNxM7y6V3y)
- Crystal Ray (Cinematic Ambient) | Park Randoux
- Ethereal Light Waves | Jon Presstone
- Transcendent Bliss | Jon Presstone
- The Slow Passage of Time | Jon Presstone
- A New Galaxy | Jayson Wayne Brown
CO.AG Music's Channel: https://www.youtube.com/@co.agmusic
CHAPTERS:
00:00: In the Space Between Stars…
02:00: Rogue Planets
07:19: Failed Stars
09:26: James Webb Telescope’s JUMBO Discovery
13:31: Sedna
16:05: ETNOs
19:07: Planet 9?
22:22: How was Planet 9 Lost?
25:30: The Ongoing Search for Planet 9
28:23: A New Candidate?
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The Fundamental Forces of Nature
19 juli 2026 · 42 min
The universe as we experience it is rendered by myriad physical processes and interactions, but they all can be boiled down to one of four fundamental forces of nature. Gravity is one of these fundamental interactions, while the visible light we observe makes up part of another. And by understanding all four, we can gage comprehensive insights into our reality, from its tiniest particles to its largest galaxies. Lees meer
SOUNDTRACK:
- Lavender | CO.AG Music (https://youtu.be/9CI7_qZay8g?si=RmeHPTy7QCgMvz3W)
- Dark Undertones | CO.AG Music (https://youtu.be/nk6UosTVZZ8?si=OmDZIatdv5k_oDqK)
- Haunted Cave | Efliz (Storyblocks Media)
- Lucid | Michael Vignola (Storyblocks Media)
- Abandoned Town | Efliz (Storyblocks Media)
- Awareness Fades First Movent | CO.AG Music (https://youtu.be/NIh86kMK91U?si=Oqv7RsxupKDtrFQo)
- Deep Meditation | Giuseppe Rizzo (Storyblocks Media)
- Dreaming Blue | Sextile (YouTube Audio Library)
- Her Eyes Just Shine | Humans Win (Storyblocks)
Check out CO.AG's Channel: https://www.youtube.com/@co.agmusic
CHAPTERS:
00:00: Four Fundamental Forces
03:14: The Nature of Gravity
07:06: The Grand Unified Force
10:37: Electroweak Epoch
13:06: The Strong Force
16:38: The Weak Force
19:27: Neutrinos & the Lepton Epoch
23:51: Let There Be Light
28:28: The Radio Spectrum
30:55: Optical Wavelengths
36:30: Ionizing Radiation
40:33: The End
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The Sound of Space
12 juli 2026 · 34 min
What is the Sound of Space? The idea that it is a silent vacuum, completely devoid of any noise, is somewhat a misconception. And though sound as humans hear it can't travel in space, there are several way in which we can extract the anthems of the cosmos. And in this video, we'll be doing just that, as we embark on a journey of Sound in Space. Lees meer
SOUNDTRACK:
- Uranus Sounds: https://youtu.be/yXfJG1gs3b4?si=zbgOABUBuLOtufgO
- The Neptune Sounds: https://youtu.be/rwnpXll_A_E?si=sxZqKfccykjGixWZ
- Jupiter Sounds (So Strange): https://youtu.be/e3fqE01YYWs?si=hIYAcZF1U7mRMMpY
- Saturn: https://youtu.be/eVfkW9oxhIk?si=1w8tIgRNir342LvF
- "Carpe Diem" - CO.AG Music: https://youtu.be/iuMBV3j55-I?si=gGwaRE5Hsgxm40rU
- "Scrooge Ice Mix" - CO.AG Music: https://youtu.be/C9jFL_6raL8?si=kKR-3t6i46kGJF7d
CO.AG's Channel: https://www.youtube.com/@co.agmusic
- "Does it Exist or Do I Have to Create It" - Chris Zabriskie (Creative Commons Licence 4.0)
Link: https://chriszabriskie.bandcamp.com/track/does-it-exist-or-do-i-have-to-create-it
Artist: https://www.chriszabriskie.com/
CHAPTERS:
00:00: A Journey of Sound
01:17: Sound in Science
06:14: Whistler-Mode Waves
08:51: Sound of the Sun
11:25: Sounds from Terrestrial Planets
14:38: Sounds from Giant Worlds
17:48: Voyager Sounds from Deep Space
19:36: Pulsars
21:54: Gravity Waves
25:06: Sonifications of Visual Data
31:52: The True "Sound" of the Universe
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Do We Live in a Multiverse?
5 juli 2026 · 34 min
Are we living in a multiverse? If so, where are all the other universes? Scientists and philosophers have pondered these questions for centuries, as they contemplated the possibility of parallel universes. The multiverse theory is not often discussed by cosmologists, due to its speculative and untestable nature. However, there are myriad different interpretations depicting how a multiverse might manifest, some of which we may be detectable within our own universe. So buckle up, because in this video we will be leaving the galaxy entirely, as we take on the biggest question of them all- the question of whether our universe is the only one. Lees meer
SOUNDTRACK (In Order):
1. Cold Aegean Waters | Humans Win
2. Meditative Bliss | Humans Win
3. Wholesome Waves | Humans Win
4. Blue Aukai | Humans Win
5. Zen Garden Whispers | Humans Win
6. Mindfulness Focus Meditation Podcast | Music Media Group
7. Calming Ombre | Humans Win
8. Shadows and Dust (Scott Buckley)
The track by Scott Buckley was provided via a Creative Commons Attribution licence, which allows reuse where credit is given. Scott Buckley's website and library can be found at the following link: https://www.scottbuckley.com.au
CHAPTERS:
00:00: The Biggest Question of Them All
03:08: Infinite Cosmos (Level 1 Multiverse)
06:53: Cosmic Inflation
10:09: Post-Inflationary Bubbles (Level 2)
12:46: Cyclical Multiverse (Level 2)
16:45: Fecund Multiverse (Level 2)
20:27: String Theory Landscape (Level 2)
24:15: Quantum Theory
26:52: Quantum Multiverse (Level 3)
29:17: Mathematical Multiverse (Level 4)
31:24: Simulated Reality (Level 4)
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The Insane Science of Neutron Stars
28 juni 2026 · 40 min
In the late 1960s, a series of anomalous, repeating radio sources began cropping up all over the Milky Way galaxy, and though initially speculated to be messages from aliens, we soon learned that they are Pulsars, a rapidly rotating neutron star emitting high volumes of radiation. In this video, we will revisit these extreme, dense objects, as the final gateway faced by matter before it collapses into a black hole. This is the insane science of neutron stars. Lees meer
SOUNDTRACK:
- Jokulls Loom (Storyblocks)
- Be Here Now (Storyblocks)
- Serenity (Storyblocks)
- Falling Through a Dream (Storyblocks)
- Sleep for Wellness (Storyblocks)
- Peaceful Background Pad (Storyblocks)
- Halloween in a Haunted House (Storyblocks)
- Underworld (Storyblocks)
- Dramatic Ambient Cinematic Music (Storyblocks)
- Monomyth, The Fall (Scott Buckley): https://www.scottbuckley.com.au/library/the-fall/
- Ambient Water (Storyblocks)
- The Natural Ambient (Storyblocks)
The track by Scott Buckley was provided via a Creative Commons Attribution licence, which allows reuse where credit is given. Scott Buckley's website and library can be found at the following link: https://www.scottbuckley.com.au
CHAPTERS:
00:00: The Crab Nebula
01:55: How is a Neutron Star Formed?
07:24: Radio Pulsars
11:18: X-Ray Binary Pulsars
13:24: Millisecond Pulsars
16:51: Magnetars
20:42: Starquakes
23:49: When Neutron Stars Collide
29:09: Quark Stars
32:23: Strange Stars
36:03: Thorne-Zytkow Objects
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Collisions of the Early Solar System
21 juni 2026 · 35 min
How did Earth get its moon? Why is Mercury so close to the sun? Why does Uranus orbit on its side? The answers to all of these questions are the many collisions that ravaged the early Solar System. Each of our neighbouring worlds bears scars which echo their violent past, from the many craters of the moon's battered surface, to the sideways rings of the planet Uranus. And in this video, we will examine a number of the most significant collisions, which each played a pivotal role in building up the Solar System as we know it today. Lees meer
SOUNDTRACK:
- The Ghost of Aberbeeg | CO.AG Music
- Edge of Silence, Ambient Sounds 06 | CO.AG Music
- Balefire | Scott Buckley Creative Commons Music
- Short Song 011023 | Chris Zabriskie Creative Commons Music
- Short Song 020823 | Chris Zabriskie Creative Commons Music
- Speak to Me | CO.AG Music
CO.AG Music: https://www.youtube.com/@co.agmusic1823
Scott Buckley Music: https://www.scottbuckley.com.au
Chris Zabriskie Music: https://chriszabriskie.bandcamp.com
CHAPTERS:
00:00: Introduction
01:37: The Terrestrial Planets
03:33: Collision that Formed the Moon
06:07: Giant Impact Hypothesis
09:42: What Happened to Mercury?
13:37: Late Heavy Bombardment
16:45: What Rammed into Uranus?
20:32: The Dwarf Planet
23:43: Pluto & Charon's Moons
27:25: Sputnik Planitia
32:58: Closing
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A Glimpse of the Sun
14 juni 2026 · 35 min
The Sun... both the giver of life, and destroyer of worlds. Host of the eight planets, and incubator of Earth with its light and heat. Yet in spite of its brilliance, the true nature of the sun's power remains shrouded in mystery, with scientists unable to explain many of the processes playing out in its atmosphere. But in 2024, NASA will attain their closest glimpse of the sun so far, as they come just five million miles from its surface, diving into the stellar Nether Zone, to "touch" the sun itself. Lees meer
BACKGROUND TRACK:
"Christmas Ambience" by CO.AG Music
Song: https://youtu.be/e23_O1koRiA?si=5gebdLo6tpmIQpY3
Artist: https://www.youtube.com/channel/UCcavSftXHgxLBWwLDm_bNvA
CHAPTERS:
00:00: Welcome...
01:45: Anatomy of the Sun
05:03: The Coronal Mystery
08:21: Space Weather & the Solar Cycle
11:59: Geomagnetic Storms
15:31: The Carrington Event
18:38: A Geomagnetic Storm in 2024?
22:20: Missions to Study Space Weather
25:02: The Parker Solar Probe
30:28: Parker's 2024 Mission
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Back to the Moon with Artemis
7 juni 2026 · 31 min
It's been more than half a century since humans last went to the Moon. But we will return before the decade is up, through NASA's revolutionary Artemis Program. But unlike its ancestral Apollo Program, Project Artemis is about more than just landing astronauts on the lunar surface. Its endgame is to enable us to stay there, and keep going back to a semi-permanent surface habitat- all in preparation for NASA's yet more ambitious, daunting endeavour of the 2030s- to reach the Red Planet, Mars. Lees meer
SOUNDTRACK:
"Finding Direction" - CO.AG Music
(https://www.youtube.com/watch?v=Xptr7cYeDBA)
"Her Smile Feeding the Cold Earth" - CO.AG Music (https://www.youtube.com/watch?v=G7gX08Ww6lY)
"Are You in Here With Us?" - CO.AG Music (https://www.youtube.com/watch?v=68e7Yqt0q_Q)
"Floating Through Black" - Boomer (Storyblocks Media)
"Echoes" - Enzo Orefice (Storyblocks Media)
"Nightlife" - CO.AG Music (https://www.youtube.com/watch?v=9PE2XxNWj0M)
"Enchanted Winds" - Humans Win (Storyblocks Media)
"Still" - Humans Win (Storyblocks Media)
"Meditation Yoga Ambient" - Watermello (Storyblocks Media)
CO.AG's Channel: https://www.youtube.com/@co.agmusic
CHAPTERS:00:00: Artemis II
02:15: Road to the Moon Landing
07:09: The Apollo Program
13:31: The New Space Race
18:00: The Artemis Program
21:32: Artemis III
23:22: Artemis IV: The Next Moon Landing
26:04: Moon to Mars
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Voyager: Beyond the Solar System (Probes Episode #3)
31 mei 2026 · 45 min
Of all the spacecraft to have visited other worlds, there are two which have travelled further than any other, discovering more about the Solar System than their inventors ever could have imagined. They are the legendary pair of Voyager Probes- still the only spacecraft ever to have visited the Ice Giant planets, Uranus and Neptune. The story of their 40 years in space makes up the topic of our video today- from the gas giants, to the ice worlds, and then out into the depths of interstellar space... Lees meer
SOUNDTRACK:
- Just a Shadow | CO.AG Music (https://youtu.be/pRDzXIV5yKg?si=Z4ooBaD1wZmV_Y7B)
- Deep Sleep | Amber Waldron (Storyblocks)
- Beyond This Earth to the Stars | CO.AG Music
(https://youtu.be/aPQl1d96_Bk?si=sLbl_gG8oqhcwuW0)
- Contemplative | Amber Waldron (Storyblocks)
- Spa Go | Gushito (Storyblocks)
- Descend Into Horror 5 | CO.AG Music
(https://youtu.be/Ev49l2ZGFmg?si=Cj4CUoob2wRCjSaQ)
- Guitar Drone Meditation | Humans Win (Storyblocks)
- SpaceShip | Jayson Wayne Brown (Storyblocks)
CO.AG's Channel: https://www.youtube.com/@co.agmusic
CHAPTERS
00:00: Welcome Back
01:31: The Grand Tour
06:00: Voyager-1's Gas Giants Mission
09:40: Voyager-1's Titan Flyby
12:27: The Pale Blue Dot
14:30 Voyager-2's Gas Giant Mission
18:15: Voyager-2's Uranus Encounter
21:24: Voyager-2's Neptune Encounter
25:00: Exiting the Heliosphere
29:19: The Interstellar Mission
34:04: One Final World... (Pluto)
37:05: New Horizons Kuiper Belt Mission
42:48: An Unconventional Signature...
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Race to the Terrestrial Planets (Probes Episode #1)
17 mei 2026 · 40 min
From studying the dusty surface of Mars, to plunging into the atmosphere of Venus, over the last 60 years, we've launched hundreds of probes into space on trajectories to visit each of the terrestrial planets. But for all the fascinating discoveries made on the way, humanity's journey towards the stars started out in a much darker place- a battlefront between the world's then two great competing superpowers. And in this first episode on my new series on probes, we will revisit this space race, and the major milestones on route to visiting each of the terrestrial planets. Lees meer
CHAPTERS:
00:00: Introduction
02:32: The Space Race
04:48: Pioneer Probes
07:32: Mariner Probes
09:55: Mariner 4 Mars Mission
12:27: Mariner 6 & 7
14:27: Mars Orbiters
17:05: Landing on Mars
18:57: Landing on Venus
21:30: The Viking Probes
26:12: Mercury Missions
33:00: Mars Rover Missions
38:16: To be Continued...
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The Final Age of the Solar System (Part 2)
10 mei 2026 · 30 min
Earth is a success story, a thriving world that has hosted life for almost 4 billion years. But, no matter how peaceful things are now, a new age is coming for the Solar System. An age of change, destruction and evolution. A place for new worlds and new stories, but one in which the Earth has no place. Lees meer
MUSIC:
- Dreamscape - Density & Time
- The Unknown - CO.AG Music - https://youtu.be/IFYTGVE1aRs
- Sunrise on Mars - Audionautix
- As Prevent You Do - pATCHES
- At the Foot of the Sphinx - Twin Musicom
- It Maintains, Eyes Change - Puddle of Infinity
- Growing Space - Astron
- The Blue Pearl - Jesse Gallagher
- Kallimachou - Dan Bodan
Sunrise on Mars by Audionautix is licensed under a Creative Commons Attribution 4.0 license.
https://creativecommons.org/licenses/by/4.0/
Artist: http://audionautix.com/
CHAPTERS:
00:00: Welcome Back
00:15: The Next Billion Years
06:10: Milkdromeda Collision
08:03: The Red Giant Branch
13:12: Habitable Moons
16:27: Titan
21:00: Titan's Prospects for Life
23:24: Horizontal and Asymptotic Giant Branch
26:52: The White Dwarf Sun
29:19: The Solar System's Last Day
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The Birth of the Solar System (Part 1)
3 mei 2026 · 35 min
The Solar System is vast and diverse, home to eight large planets, including one which gave rise to life. While humanity was born too late to witness the events that occurred at the birth of the Solar System first-hand, by peering into the surroundings of others stars, we are starting to piece together the events that unfolded at the birth of our own Solar System. Today, we shall explore the culmination of these decades of research, as we tell the story of the birth of the Solar System. Lees meer
MUSIC:
- In the Throes - Asher Fulero
- Song of Sadhana - Jesse Gallagher
- Lord of the Dawn - Jesse Gallagher
- Cylinder Three - Chris Zabriskie
- Let Your Enemies Feel the Weight of Your Burdens - Chris Zabriskie
- Lost Kingdom - CO.AG Music
- Underwater Exploration - Godmode
- The Sky is on Fire - CO.AG
- I Am Running a Marathon - Chris Zabriskie
- Somnolent - The TidesCO.AG's can be found on his YouTube channel:
https://www.youtube.com/channel/UCcavSftXHgxLBWwLDm_bNvAAll songs by Chris Zabriskie are licensed under a Creative Commons 4.0 Attribution License.
https://creativecommons.org/licenses/by/4.0/
Artist: http://chriszabriskie.com/
CHAPTERS:
00:00: Introduction
01:11: The Solar System
04:44: The Nebular Hypothesis
07:27: Star Formation
11:54: Planetary Formation Window
18:20: The Story of the Solar System
21:34: Rise of the Gas Giants
25:23: The Terrestrial Planets
30:46: Three Water Worlds
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The James Webb Telescope (2022 Version)
26 april 2026 · 35 min
On December 25th, 2021, NASA's most sophisticated, ground-breaking and expensive observatory ever blasted off from the Earth. The James Webb Telescope is an infrared observatory, capable of looking back all the way to the universe's first light. In this video, we will explore how this initiative came to be, and what the future holds in this exciting new age of astronomy. Lees meer
SOUNDTRACK:
- Valhalla [Long Version] - CO.AG Music
- Show Me the New Way - CO.AG Music
- The Deep [Long Version] - CO.AG Music
- I Am Blessed - CO.AG Music
- Is This The Way It Ends - CO.AG Music
- The Young & Old Know Love - Puddle of Infinity (YouTube Audio Library)
CO.AG Music's Channel: https://www.youtube.com/channel/UCcavSftXHgxLBWwLDm_bNvA
CHAPTERS:
00:00: Lift-off!
01:39: Background
03:55: Webb's Troubled Development
08:17: Webb's Mirrors
10:48: Surveying in Infrared
13:51: Webb's Sunshield & Orbit
16:52: Deployment Phase
22:06: The Cosmic Dawn
24:14: Light from the First Stars
28:02: Search for Habitable Exoplanets
30:46: Other Uses for Webb
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When Black Holes Collide
19 april 2026 · 27 min
Black holes are fascinating in so many ways- especially when you put two of them together. Their resonance and orbit physically ripples space itself, emitting waves that can travel through space for billions of years. Since 2016, we have been able to detect these gravitational wave events, and earlier this month, we detected a record-breaking one. Lees meer
SOUNDTRACK:
- Wander - Emitt Fenn (YouTube Audio Library)
- A Slow Dream - Emily A. Sprague (YouTube Audio Library)
- Nexus Dawn - CO.AG: https://www.youtube.com/watch?v=oTrZx2KM6JA&t
- Last Night I Dreamt I Saw True Love In Your Eyes - Chris Zabriskie: https://soundcloud.com/chriszabriskie/last-night-i-dreamt-i-saw-true
- Passing a Foreign Moon - I Think I Can Help You (YouTube Audio Library)
- Thin Places - Jesse Gallagher (YouTube Audio Library)
- Running Out of Time - CO.AG: https://www.youtube.com/watch?v=P13lnycYaeI
- Sound of the Earth EM White Noise: https://www.youtube.com/watch?v=QB2AK-odioc
CO.AG's Channel: https://www.youtube.com/channel/UCcavSftXHgxLBWwLDm_bNvA
All tracks by Chris Zabriskie licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/)
Artist: http://chriszabriskie.com/
CHAPTERS:
00:00: Introduction
01:08: What is a Black Hole?
04:07: Types of Black Hole
05:26: Misconceptions About Black Holes
08:46: Anatomy of Black Holes
12:26: Inside the Black Hole
14:09: Intermediate Mass Black Holes
15:17: Black Hole Mergers
17:09: Gravitational Wave Signals
19:12: The Pair Instability Gap
23:03: The Big Crunch
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Dwarf Planets: Lesser Worlds
12 april 2026 · 28 min
The Solar System is home to eight principal planets, but this is far from the full picture. Hidden beyond the orbit of Neptune are dozens of small, icy worlds, known as Dwarf Planets, or Minor Planets! The best example is Pluto, but there are dozens more orbiting within the same band of material in the outer Solar System. Today, we will visit these frozen, far out worlds first hand. Lees meer
MUSIC:
- Mist - Odonis Odonis
- Lucid Haze - Amulets
- Shallow Depths - jAde Wii
- At the Foot of the Sphinx - Twin Musicom
- Length of Light - Amulets
- Crystaline - Amulets
- Doll Dancing - Puddle of Infinity
- I Am Running Down the Long Hallway - Chris Zabriskie
- Jesu, Joy of Man's Desiring - Kevin MacLeod
At the Foot of the Sphinx by Twin Musicom is licensed under a Creative Commons Attribution 4.0 licence. https://creativecommons.org/licenses/by/4.0/
Artist: http://www.twinmusicom.org/
I Am Running Down the Long Hallway of Viewmont Elementary by Chris Zabriskie is licensed under a Creative Commons Attribution 4.0 licence. https://creativecommons.org/licenses/by/4.0/
Source: http://chriszabriskie.com/honor/
Artist: http://chriszabriskie.com/
Jesu, Joy of Man's Desiring by Kevin MacLeod is licensed under a Creative Commons Attribution 4.0 licence. https://creativecommons.org/licenses/by/4.0/
Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1100189
Artist: http://incompetech.com/
CHAPTERS:
00:00: Introduction
01:52: Minor Planets
05:34: Ceres
09:15: The Kuiper Belt
11:49: Pluto
16:43: Why the IAU Demoted Pluto
17:46: Eris
20:17: Haumea
22:08: Makemake
24:24: Arrokoth
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The Oort Cloud: The Solar System's Shell
5 april 2026 · 24 min
What lies at the edge of the Solar System? Far beyond the orbit of Neptune and the Kuiper Belt, deep into interstellar space, we find a vast, thick shell of icy space debris. We have never seen it directly, but we know it exists- because it is the source of the most distant comets that we see entering the Solar System. So why is it there? Today we'll find out. Lees meer
All background songs in this video were sourced from the royalty and attribution-free YouTube Audio Library.
CHAPTERS:
00:00: Introduction
02:01: The Oort Cloud
05:18: The Scale of the Cloud
06:47: Formation of the Oort Cloud
09:33: The Source of All Comets
13:17: The Hills Cloud
14:40: Sedna
16:12: The Outer Oort Cloud
17:13: Siding Spring, Hale Bopp, Lovejoy
19:20: Future Missions to the Oort Cloud
21:46: Extra-solar Oort Clouds
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Moons Beyond the Solar System
29 maart 2026 · 18 min
Most large planets have moons. We have discovered almost 200 in our Solar System alone, and so we expect that the Milky Way is teeming with many more- perhaps even outnumbering planets and stars. With so many moons, it adds a plethora of additional holdouts in the galaxy capable of supporting life, and thus they are tantalising targets for scientists. However, extra-Solar moons are so insanely distant and dark against the backdrop of space, that them is a tremendous challenge. In this episode, we will cover its story so far. Lees meer
SOUNDTRACK:
- Satya Yuga | Jesse Gallagher (YouTube Audio Library)
- The Sleeping Prophet | Jesse Gallagher (YouTube Audio Library)
- Where in Literally | pATCHES (YouTube Audio Library)
- The Golden Present | Jesse Gallagher (YouTube Audio Library)
CHAPTERS:
00:00: Introduction
01:09: Exomoons
04:26: How We Find Exomoons
08:53: Kepler 1625 b-i
13:28: Other Exomoon Candidates
-
Europa: A Frozen Oasis
22 maart 2026 · 23 min
Europa is a fascinating moon, which is thought to be hiding a global ocean below its frozen surface. This makes it a hotspot for research and missions, with the ultimate goal being to identify an independent life source. In this video, we will go over this iconic satellite of Jupiter by the numbers, as we blow its perplexing mysteries wide open. Lees meer
All background music came from the Royalty-Free & Attribution-Free YouTube Audio Library
CHAPTERS:
00:00 Introduction
00:58: Facts About Europa
04:22: Europa’s Ice Sheet
06:52: Missions to Europa
09:29: The Subsurface Ocean
11:19: Tidal Heating
13:44: Europa's Prospects for Life
18:15: Future Missions to Europa
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Corrupted Stars: Hypothetical Stars that Defy Explanation
15 maart 2026 · 25 min
Not every star in the universe can be seen shining brightly in the night sky. There are dozens of types of fascinating hypothetical stars, which are characterised by their extreme behaviour. Today, we will be taking a look at a few of these corrupted stars, from the start of the universe right up until the end. Lees meer
MUSIC TRACKS:
- Passing a Foreign Moon - I Think I Can Help You (YouTube Audio Library)
- The Shadow Self - I Think I Can Help You (YouTube Audio Library)
- The Bardo - I Think I Can Help You (YouTube Audio Library)
- To Have To In Least Water - pATCHES (YouTube Audio Library)
- Surviving the Asteroid Belt - I Think I Can Help You (YouTube Audio Library)
- Wander - Emmit Fenn (YouTube Audio Library)
- Because for Everything There Is Someone - pATCHES (YouTube Audio Library)
- Adrift - ELPHNT (YouTube Audio Library)
- Verve - Benjamin Martins (YouTube Audio Library)
- Hollows - Houses of Heavens (YouTube Audio Library)
- Meeting Again - Emily A Sprague (YouTube Audio Library)
CHAPTERS:
00:00: Introduction
01:29: Population III Stars
04:50: Quasi Stars
07:42: Thorne-Zytkow Objects
10:37: Q-Stars and Exotic Matter
14:02: Quark Stars
15:51: Electroweak Stars
17:39: Strange Matter and Strange Stars
20:13: White Dwarfs
21:54: Frozen Stars
22:37: Black Dwarfs
23:18: Iron Stars
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Ghost Galaxies
8 maart 2026 · 15 min
Not every galaxy is a fully formed spiral or elliptical galaxy. Some are much smaller, and orbit larger galaxies as well as each other, like ghosts. Today, we will examine these ghost galaxies- the satellites of the Milky Way and Andromeda. Lees meer
SOUNDTRACK:
- The Sun is Scheduled to Come Out Tomorrow - Chris Zabriskie
- Cylinder Four - Chris Zabriskie
- I Can't Imagine Where I'd Be Without It - Chris Zabriskie
- Cylinder Two - Chris Zabriskie
All tracks by Chris Zabriskie licensed under a Creative Commons Attribution license
(https://creativecommons.org/licenses/by/4.0/)
Artist: http://chriszabriskie.com/
00:00: Antlia 2: A Ghost Galaxy
02:16: Dwarf Galaxies
06:14: Types of Dwarf Galaxy
08:00: Case Studies
09:14: Magellanic Clouds
12:35: The Triangulum Galaxy
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The Mind-Blowing Scale of Voids & Supervoids
1 maart 2026 · 16 min
Supervoids are the enormous, empty spaces between galaxy clusters and galaxy filaments. But just because they are empty, doesn't mean they can't be filled with fascinating science! They have taught us a great deal about both galaxy structures in the early universe, and how they grow in the present. And today we'll be venturing into a few of the biggest! Lees meer
MUSIC:
- Long Walks [Emily A Sprague] - YouTube Audio Library
- Fairy Meeting [Emily A Sprague] - YouTube Audio Library
- A Slow Dream [Emily A Sprague] - YouTube Audio Library
- Devoid [ELPHNT] - YouTube Audio Library
- Rain Cloud Music [Emily A Sprague] - YouTube Audio Library
CHAPTERS:
00:00: Emptiness in Space
02:04: Defining a Void
03:52: Mapping Voids Around Us
04:38: How Voids Form
07:05: The Bootes Void
09:16: Voids and Dark Energy
10:33: The Cold Spot
12:10: The KBC Void
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Large Quasar Groups
22 februari 2026 · 32 min
Quasars are the brightest phenomenon in the entire universe, able to outshine any type of star, and even entire galaxies containing hundreds of billions of them. They are the product of monster black holes at the centres of large galaxies, and so when we find multi-billion light year clusters of quasars dotted around the early universe, we are forced to reconsider some of our most fundamental assumptions of cosmology. Lees meer
BACKGROUND MUSIC:
- Cylinder One - Chris Zabriskie
- Descent - The Tower of Light (YT Audio Library)
- Dreaming Blue - Sextile (YT Audio Library)
- Turn - The Tower of Light (YT Audio Library)
- There Are Many Different Kinds of Love - Chris Zabriskie
- Retro Dreamscape - Twin Musicom (YT Audio Library)
- Flecks of Light - The Tower of Light (YT Audio Library)
- Clouded - Public Memory (YT Audio Library)
- Trickling Up - Godmode (YT Audio Library)
Songs by Chris Zabriskie are licensed under Creative Commons 4.0 Licence:
- Artist: http://chriszabriskie.com/
- Source: http://chriszabriskie.com/cylinders/
00:00: Introduction
02:00: What is a Quasar?
09:46: The Peak Quasar Epoch
11:50: The Search for Quasars
20:39: Large Quasar Groups
22:15: Cosmic Structures & the Cosmological Principle
24:35: The Largest LQGs
27:34: Seeing Patterns In Noise
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The Largest Star (2021 Version)
15 februari 2026 · 27 min
Stars come in a wide range of sizes, but how do we calculate a star's size to determine which is the largest? In this episode, we will find out how stars are measured to determine their mind-boggling sizes, and above all, which of them are the biggest of all. Lees meer
PLEASE NOTE: This one is an older video of mine, back in 2021 when it was thought that the largest known star was Stephenson 2-18. It has since been reassessed as most likely not a member of the Stephenson-2 Cluster, and thus not amongst the candidates for the largest star. I plan to remake this video some time in 2026.
SOUNDTRACK:
Two songs in this video were made by Chris Zabriskie. (http://chriszabriskie.com/)
- Abandon Babylon (Album from which the songs came: https://chriszabriskie.bandcamp.com/album/abandon-babylon)Dark Fog & Ice Demon by Kevin MacLeod are both licensed under a Creative Commons Attribution 4.0 licence.
Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1300031 , http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1200061
Artist: http://incompetech.com/
All other music provided by the YouTube Audio Library
CHAPTERS:00:00: Introduction
01:04: What Are Stars?
05:40: How Stars Get Big
09:38: Problems with Direct Measurements
11:31: Parallax
13:01: Indirectly Measuring Stars
15:33: VY Canis Majoris
18:30: UY Scuti
22:59: Stephenson 2-18
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The Great Attractor
8 februari 2026 · 30 min
No matter where you are, you are always moving. The Earth orbits the sun, while the sun moves round the galaxy. But what makes the galaxy move? That is the topic of our video today. Everything in our local galaxy supercluster, Laniakea, is being dragged towards a high concentration of mass obscured by the opaque clouds of our galaxy, but what is it? It has all the ingredients for an epic cosmic mystery, the mystery of the Great Attractor. Lees meer
Background Songs by CO.AG Music: https://www.youtube.com/channel/UCcavSftXHgxLBWwLDm_bNvA
Transcending Ambient Chill Out Music: https://www.youtube.com/watch?v=aAp5ecwlU7MThe Deep: https://www.youtube.com/watch?v=e9TJrLeqnhw
All other tracks are from the YouTube Audio Library
CHAPTERS:
00:00: Introduction
02:13: Galaxies
04:04: Our Local Universe
06:56: The Laniakea Supercluster
09:00: The Great Attractor
10:03: The Zone of Avoidance
11:45: History of Great Attractor Observations
13:56: Surveying the Great Attractor Region
18:39: Dark Flow
20:27: The Dipole Repeller
22:16: CIZA Search
23:37: The Shapley Supercluster
26:03: The Vela Supercluster
27:30: A Mystery Solved?
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The Cosmic Scale
1 februari 2026 · 33 min
How large is the universe? Where does it begin and end? How does it expand? These are some of the biggest questions of astronomy- and while humanity is so small that we may never be able to fully understand the universe's true scale, advancements in technology are helping us to look ever-deeper into space, towards the edge of our observable universe known as the Cosmic Horizon. Today, we will get to know our universe, its laws, and its awe-inspiring scale above all. Lees meer
SOUNDTRACK:
Special thanks to Lombus, who allowed me to use his song Doppler Shores in the title screen:
https://lombus.bandcamp.com/track/doppler-shores
Songs by Chris Zabriskie are licensed under a Creative Commons Attribution 4.0 licence (https://creativecommons.org/licenses/by/4.0/ )
- The Theatrical Poster...: http://chriszabriskie.com/vendaface/
- Unfoldment, Revealment... http://chriszabriskie.com/reappear/
- Cylinder Five: http://chriszabriskie.com/cylinders/
- Take Off and Shoot a Zero: http://chriszabriskie.com/stuntisland/
- Oxygen Garden: http://chriszabriskie.com/divider/
Artist: http://chriszabriskie.com/
Other songs are from the YouTube Audio Library
CHAPTERS:
(00:00) Introduction
(02:23) Defining the Universe
(06:51) The Big Bang
(09:12) The Observable Universe
(10:53) The Hubble Telescope
(11:46) The Hubble Deep Field
(16:49) Cosmic Expansion
(19:40) Redshift
(21:48) The Cosmic Horizon and the Unobservable Universe
(25:36) Accelerating Expansion
(28:29) Dark Energy
(30:14) The End of the Universe
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Beyond the Observable Universe
25 januari 2026 · 39 min
What we perceive to be the edge of our universe is not the actual edge of the universe, with most scientists in agreement that more space lies hidden beyond what we're able to see. Last time out, we travelled to the very edge of our observable universe. But today, we will be going even farther, as we wade out into the darkness of the unobservable universe. Lees meer
Soundtrack by CO.AG Music: https://www.youtube.com/@co.agmusic1823
- Taboo-Inspired Intro Track: https://youtu.be/YA3yfPh38mc
- Strange Days Ahead: https://youtu.be/QaGsRzO-2EA
- The Last Breath: https://youtu.be/AekcHz0ZdjU
- The Monolith: https://youtu.be/XK_iQLGpId0
- ESP Background Track: https://youtu.be/rT2ONCrdtVU
- Encounter: https://youtu.be/vxdlSXZvxL0
- Direct Space: https://youtu.be/G7-3crlxDDE
- Do You Understand: https://youtu.be/BXmPuHqXUzc
- Phonon: https://youtu.be/2Mgk6jem7Zg
- Dark Enigma 13: https://youtu.be/mGFxASTdnhc
- Book of the Dead: https://youtu.be/6X3RYrOy1RE
CHAPTERS:
(00:00) Welcome Back
(01:50) Beyond the Cosmic Horizon
(05:42) The Shape of the Universe
(07:45) Universal Curvature
(12:35) Critically Dense Flat Universe
(15:18) Drawing Triangles on the CMB
(18:52) The Flatness Problem
(22:19) Multiply Connected Universe
(27:19) 4D Hyper Torus
(29:17) Curved on a Large Scale?
(31:50) Cosmic Inflation
(37:09) Closing Statements
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Journey to the Edge of the Universe
18 januari 2026 · 43 min
Ever wonder what it would be like to fly all the way to the edge of space? Well in this video, we'll be doing just that. Using beautiful images snapped by the Hubble and James Webb telescopes, we will embark on a tour of our universe- venturing deep into the darkness, and uncovering the most jaw-dropping landmarks along the way. This is our journey to the edge of the universe. Lees meer
SOUNDTRACK [In order of appearance]:
- MindHunter (CO.AG): https://youtu.be/72JbdVDg3q0
- 11:11 at Smith - Ninth Street (Chris Zabriskie)
- Catafalque (CO.AG): https://youtu.be/Bf_24aUbaQ4
- Satanic (CO.AG): https://youtu.be/E_gQrAMVK8U
- Dark Enigma 11 (CO.AG): https://youtu.be/VVbH2gU8TvA
- It Will Make You Feel Better (Chris Zabriskie)
- Dark Enigma 9 (CO.AG): https://youtu.be/rkZg2FCRcjg
- I Refuse to Accept There's Nothing I Can Do About it (Chris Zabriskie):
- Lower Third Hall (Chris Zabriskie)
- Omen (CO.AG): https://youtu.be/C_ejkBhmmJE
Tracks by CO.AG Music and Chris Zabriskie. Songs by Chris Zabriskie are licensed under a Creative Commons Re-use Licence. Check out his new album, which was featured in this video: https://chriszabriskie.bandcamp.com
Check out CO.AG's channel, where he uploads loads of cool ambient tracks: https://www.youtube.com/channel/UCcavSftXHgxLBWwLDm_bNvA
FOOTAGE:
The space scenes in this video were captured using SpaceEngine Pro, a virtual universe simulator:
http://spaceengine.org/
Images of space and scientific visualisations are public domain content, and can be downloaded from NASA's GSFC Visualisation Studio: https://www.nasa.gov/goddard
Other visualisations and images of space provided by the European Southern Observatory [ESO]: https://www.eso.org/public/
Graphic of the Virgo Supercluster by Ethylice4: https://www.deviantart.com/ethylice4
Stock footage sequences provided by Vecteezy.com . Pro License Holder: https://www.vecteezy.com/members/sea-media-stock
CHAPTERS:
(00:00) Welcome
(01:32) What is the Observable Universe?
(05:15) …
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The Dark Energy Mystery
11 januari 2026 · 41 min
In 1998, two teams of scientists measured the universe's rate of expansion, expecting to find it slowing down on route to a collapse. But instead, they found the opposite- the universe's expansion appears to be accelerating, having expanded more in the latter half of its life. In attempting to explain this mysterious behaviour, they revived one Einstein's long-since-forgotten ideas. Lees meer
Thank you to SpaceWave - Cosmic Relaxation for yet another amazing soundtrack! If you liked this video's music, check it out below:
Dark Energy Soundtrack:
https://www.youtube.com/channel/UCj3460Ylt4JEcEiW6PxCH9Q
SpaceWave's Channel: https://youtu.be/XntDsSR38qU
CHAPTERS:
(00:00) Introduction
(02:27) Accelerating Expansion
(05:09) Einstein's Greatest Blunder
(08:26) How Space Expands
(12:11) Redshift & Standard Candles
(17:03) Type 1a Supernova Searching
(19:25) Λ-CDM
(22:08) Baryonic Acoustic Oscillations
(26:27) Future Missions to Study Dark Energy
(28:46) Vacuum Fluctuations
(32:29) Quintessence
(34:43) Phantom Energy
(37:17) The Big Rip
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The Dark Matter Mystery
4 januari 2026 · 40 min
Dark Matter is a theoretical form of invisible mass, which has never been definitively detected. You've probably heard of it before, as it makes up a large part of the physics you find in textbooks. But how can something that's never been seen have so much scientific confidence behind it? Furthermore, if we can't see it, how do we know that it is really there? And if it's not, what are the alternative explanations? These are the questions we will be aiming to answer, as we delve into the Dark Matter mystery. Lees meer
The soundtrack was created by SpaceWave - Cosmic Relaxation.Listen to the full 2-hour Soundtrack:
https://youtu.be/ZDjXSOkThzk
I listen to his ambient music while I write and was keen to bring him on board. Thank you SpaceWave!
Check out his Channel: https://www.youtube.com/channel/UCj3460Ylt4JEcEiW6PxCH9Q
CHAPTERS:
(00:00) Introduction
(01:53) What is Dark Matter?
(05:00) Signs of Missing Mass
(08:21) Lambda-Cold Dark Matter Model
(11:21) The Early Universe
(14:12) Dark Matter Structures
(20:22) The Bullet Cluster
(24:23) Weakly Interacting Massive Particles
(26:20) Search for Dark Matter
(31:00) Alternative Theories
(32:57) Modified Gravity
(35:31) Entropic Gravity
(38:06) Dark Energy?
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In Search of the Largest Black Holes
28 december 2025 · 31 min
Lately, there has been talk of a new largest black hole, named Phoenix A*, which is said to have a mass greater than 100 billion times the mass of the sun! This is much larger than the previous record holder, TON-618. But can we really rely on this prediction? And if not, then what is the largest black hole out there, and how do we know its true size? These are the questions we will answer in search of the universe's biggest black holes. Lees meer
Soundtrack: CO.AG Music: https://www.youtube.com/@co.agmusic1823
- Old Radio Transmission: https://youtu.be/1O8to3C5rM4
- Oprahme: https://youtu.be/2nliN0RbIyw
- Long Relaxation Mix: https://youtu.be/8TRjdzXJ5-M
- The Earth is Screaming: https://youtu.be/38P0cv_0z5M
- Welcome to Somethink: https://youtu.be/R73ZWEDSiM4
- What’s Left: https://youtu.be/Qlp7DmhU1KM
- The Fallen Angel: https://youtu.be/U0YL-4yDKJM
- Watch My World Burn: https://youtu.be/ejMf7HtsYWw
- A Deep Digital Dream: https://youtu.be/Kou0UzcFd8Q
- Advanced Technology Mix: https://youtu.be/dG7J2HZYqpM
- A Slow End: https://youtu.be/FVbGDg-pjNE
CHAPTERS:
00:00: Start
01:50: Stellar Black Holes
05:00: Intermediate & Supermassive Black Holes
07:09: IC 1101*
09:39: TON-618
12:45: The Phoenix Cluster
15:34: Phoenix A
18:18: X-Ray Cavities & Eruptions
20:28: Phoenix A* Black Hole
22:26: Is Phoenix A* the Largest Black Hole?
25:33: Other Ultramassive Black Hole Candidates
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The Oldest Map in the Universe
21 december 2025 · 28 min
The Cosmic Microwave Background (CMB) is the oldest light in the universe that we can see or detect. It was emitted only 380,000 years after the universe was born, back when it was a much more chaotic place. This microwave-band static is fundamentally linked to the Big Bang, and if we map it precisely enough, we can discover a wealth of information about the age, composition and structure of the universe. Lees meer
MUSIC:
- Deep Static: https://youtu.be/WB5jmdJvQeU
- Cosmic Microwave Background Noise: https://youtu.be/YkE8d2vrWI0
- I Knew My Way Downtown - Chris Zabriskie
- Everyone Will Notice, No One Will Say Anything - Chris Zabriskie
- You Fiddle, I'll Burn Rome - Chris Zabriskie
- God be with You til we Meet Again - Chris Zabriskie
- A Million Thoughts - CO.AG Music: https://youtu.be/nOSPuq64ORQ
- A Person That They Will All Fear - CO.AG Music: https://youtu.be/NccLZFUIxlM
- Haunted - CO.AG Music: https://youtu.be/T0WjL4phiuk
- We Can Rebuild Your World - CO.AG Music: https://youtu.be/pe_mx7YiPwMAll songs by Chris Zabriskie are licensed under a Creative Commons 4.0 License (re-use allowed)
I Made This While You Were Asleep (Album): https://chriszabriskie.bandcamp.com/album/i-made-this-while-you-were-asleep
Chris Zabriskie's Website: https://www.chriszabriskie.com
CO.AG's Channel: https://www.youtube.com/channel/UCcavSftXHgxLBWwLDm_bNvA
CHAPTERS:
00:00: Static
01:48: The Big Bang
04:58: The CMB: The Final Photons
08:16: History of Background Radiation Observations
10:58: Missions to Map the CMB (COBE, WMAP, Planck)
13:09: What Does the Map Show Us?
15:17: Cosmic Inflation
17:04: The Cold Spot
21:15: Hawking Points
26:17: The End?
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Planetary Ring Systems
14 december 2025 · 22 min
Saturn's most distinguished feature are its brilliant, shining rings, which have intrigued astronomers since the 17th century. But in the 1980s, Voyagers 1 & 2 revealed to us that each of the large planets in the Solar System is home to a ring system, but each varies wildly in its composition, arrangement, and substantiality. In this video, we will explore the complex and elegant natural phenomenon that is planetary ring systems. Lees meer
Music:
- Drifting at 432Hz | Unicorn Heads
- The Oceans Continue to Rise | Chris Zabriskie
- Passing a Foreign Moon | I Think I Can Help You
- The Five Books | I Think I Can Help You
- I Want To Fall in Love on Snapchat | Chris Zabriskie
- Nevada City | Huma Huma
- Open Sea Morning | Puddle of Infinity
Songs by Chris Zabriskie are licensed under a Creative Commons Attribution 4.0 License.Artist: http://chriszabriskie.com/
All other songs were retrieved from the YouTube Audio Library
CHAPTERS:
00:00: Introduction
02:05: What is a Ring System?
04:31: How do Ring Systems Form?
08:03: The Rings of Saturn
11:58: The Rings of Uranus
13:43 Shepherd Moons
16:03 J1407b - Super Saturn Rings
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The New Largest Galaxy
7 december 2025 · 31 min
What is the largest galaxy? For a long time, the largest was thought to be IC 110. But since 2022, there has been talk of a new, even larger galaxy, Alcyoneus, which is said to be more than 16 million light years in diameter! But is that what's really being proposed in the original paper detailing the discovery? Not exactly, because Alcyoneus is a Radio Galaxy. But what is a radio galaxy, and if Alcyoneus is not the largest galaxy, then how large really is it? Lees meer
SOUNDTRACK:
All tracks by CO.AG Music: https://www.youtube.com/channel/UCcavSftXHgxLBWwLDm_bNvA
- Sound of the Sun: https://youtu.be/4u6Gt7NXlDE
- A World of Different Dimensions: https://youtu.be/g9vULHb_7mQ
- Your Outer World: https://youtu.be/OnZjKSQS9b0
- Travel Beyond Your Imagination: https://youtu.be/Z2XDR9N00Jo
- Create the Future: https://youtu.be/z9HM9VTnFDQ
CHAPTERS:
(00:00) What is the Largest Galaxy?
(02:02) Galaxies
(04:13) IC 1101
(06:32) Radio Galaxies
(12:31) Giant Radio Galaxies
(14:40) Alcyoneus, Largest Radio Galaxy
(18:39) Alcyoneus' Host Galaxy
(22:57) The Largest Galaxy- Some Considerations
(28:51) Closing Statements
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Cosmic Catastrophes: Types of Supernova
30 november 2025 · 30 min
Supernovae are some of the brightest and most powerful explosions in the universe, bright enough to outshine entire galaxies. These cosmic catastrophes come in many varieties, characterised by their elements and light. Today, we will cover the various types of supernova as we take a deep dive into these tremendous explosions. Lees meer
SOUNDTRACK:
- Woodstock | Joni Mitchell: https://youtu.be/cRjQCvfcXn0
- Spenta Mainyu | Jesse Gallagher (YouTube Audio Library)
- Access Astronomy Pt. 1 | CO.AG: https://youtu.be/6cBmmEH18ek
- Away | Patrick Patrikios (YouTube Audio Library)
- Orbiting Knowhere | Corbyn Kites (YouTube Audio Library)
- Guardian of the Threshold | I Think I Can Help You (YouTube Audio Library)
- What Am I | CO.AG Music: https://youtu.be/DlqnuShotd8
- The End | Kyote Hearing (YouTube Audio Library)
- Attraction | Density & Time (YouTube Audio Library)
- The Four Masks | I Think I Can Help You (YouTube Audio Library)
- Black Moon | CO.AG Music: https://youtu.be/uFatcfIA_oQ
- Magnetic Lullaby | Amulets (YouTube Audio Library)
- So Dark | CO.AG Music: https://youtu.be/FzMUeqp_Akg
- No. 8 Reqium | Esther Abrami (YouTube Audio Library) CO.AG Music's Channel: https://www.youtube.com/channel/UCcavSftXHgxLBWwLDm_bNvA
CHAPTERS:
(00:00) Stardust
(01:58) What is a Supernova?
(04:41) Historic Supernovae Observations
(06:58) SN-1987A
(09:41) Classifying Supernovae
(12:00) Core Collapse Supernova
(18:40) Types of Core Collapse Supernovae
(21:35) Type 1a Supernova
(24:05) Standard Candles
(26:23) Kilonova
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The Other Side of a Black Hole
23 november 2025 · 30 min
One of astronomy's great, enduring mysteries is what really happens on the inside of a black hole. We know that anything which gets too close to a black hole is destroyed, but if you were able to jump right inside of one, then what would happen and where would you go? Today, we will explore a few of the many exotic and fascinating possibilities for what lies on the other side of a black hole. Lees meer
SOUNDTRACK:
- The Anunnaki Return | Jesse Gallagher (YouTube Audio Library)
- Access Astronomy pt. 3 | CO.AG Music
- Access Astronomy pt. 5 | CO.AG Music
- Just Implants | CO.AG Music
- Where Have All the Cybertrackers Gone | Chris Zabriskie
- The Ambient | Kevin MacLeod (YouTube Audio Library)
- Cylinder Seven | Chris Zabriskie
- The Golden Present | Jesse Gallagher (YouTube Audio Library)
CO.AG's Channel: https://www.youtube.com/channel/UCcavSftXHgxLBWwLDm_bNvA
All songs by Chris Zabriskie are licensed under a Creative Commons 3.0 License (reuse allowed). Chris Zabriskie's website: https://www.chriszabriskie.com
CHAPTERS:
(00:00) Introduction
(01:55) Bending Spacetime
(04:23) Inside a Black Hole
(05:42) Wormholes & Einstein-Rosen Bridges
(08:38) White Holes
(11:54) Schwarzschild Metric & the Eternal Black Hole
(13:29) Penrose Diagram
(15:48) The Case Against White Holes
(18:49) White Holes as New Universes
(21:29) Black Hole Cosmology
(24:49) Hawking Radiation & the Final Phase
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A Tour of the Triangulum Galaxy
12 november 2025 · 33 min
The Milky Way is surrounded by more than 50 near neighbour galaxies that make up the Local Group. The two largest galaxies are us and Andromeda, but we also have an often-overlooked third large galaxy in our neighbourhood- the Triangulum Galaxy. This galaxy is like its own mini-Milky Way, containing stars, clouds, clusters, supernova remnants, and satellites. These are the checkpoints in the Triangulum Galaxy which make up our tour today. Lees meer
SOUNDTRACK: All tracks made by CO.AG Music: https://www.youtube.com/channel/UCcavSftXHgxLBWwLDm_bNvA
- A Dark Path: https://youtu.be/ORk0p0thnWU
- Heart of This Ancient City: https://youtu.be/uUw8RqPVoDU
- Was This the End or Just the Beginning: https://youtu.be/6A0UHOhRxZc
- Build, Create, Beautify: https://youtu.be/-Aq8PUPlbxU
- As the Sun Sets at the Temple: https://youtu.be/xBqirbnidbI
- Northern Lights: https://youtu.be/CgzVDdNcGLo
- Post Apocalyptic: https://youtu.be/4l_PxLFbdHQ
- Dark Horror Long Version: https://youtu.be/r632JTHP0mM
- Moonlight Over Rome: https://youtu.be/Oj3niiEu05E
CHAPTERS:
(00:00) Introduction
(01:19) History of M-33
(04:50) Observations of M-33
(07:07) Morphology
(09:45) Satellite Galaxies
(11:43) H-II Regions
(14:34) NGC-604
(16:21) Resolving M-33's Stars
(20:13) Supernovae & Black Holes
(22:24) No Supermassive Black Hole?
(25:40) Future of the Local Group
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Journey to the Andromeda Galaxy
11 november 2025 · 35 min
The Andromeda Galaxy is our massive galactic neighbour, a spiral galaxy more than double the size of the Milky Way. In this video, we will be taking a journey, from this galaxy's ancient history, right up to its remote future- using the latest and most beautiful images to know our cosmic neighbour like never before. This is our journey to the Andromeda Galaxy... Lees meer
Soundtrack by CO.AG Music: https://www.youtube.com/channel/UCcavSftXHgxLBWwLDm_bNvA
- Drifting Through Time: https://youtu.be/kVmCVk9NM3Q
- Wonderful Things: https://youtu.be/5fBOHzGRTRI
- Don't Fear Your Fears: https://youtu.be/8xme2NH5vEs
- Space: https://youtu.be/TIP8_SD5VDI
- Dreams: https://youtu.be/o3FJkyGRvk4
- Space Empires: https://youtu.be/kAvGZxtBzpw
- Thanks Everyone: https://youtu.be/00dPbEvyNMY
- Crystal Dream: https://youtu.be/4BHkReLzbBs
- 5500°C: https://youtu.be/Jr5-xFaiXp0
- Forever: https://youtu.be/TblP1MS9Z5w
- The Crystal Stream: https://youtu.be/yNxWUXK2pxo
CHAPTERS:
(00:00) Introduction
(01:19) Historical Observations of Andromeda
(05:25) The Great Debate
(08:12) Modern Efforts to Study Andromeda
(09:36) Road to Andromeda
(14:00) Andromeda's Satellites
(17:48) Inside the Andromeda Galaxy
(21:07) Worlds Inside Andromeda
(22:51) Black Holes in Andromeda
(25:00) Andromeda's Blueshift
(27:32) Collision with the Milky Way
(31:07) Milkomeda
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History of the Milky Way
10 november 2025 · 26 min
On the darkest of nights, free from the glow of the moon and the haze of light pollution, a stunning, striking formation can be seen imprinted upon the sky. That imprint is our galaxy- the Milky Way. Our galaxy is a giant, which extends for hundreds of thousands of light years. But by measuring the motions and velocities of the stars in our neighbourhood, both their past and future trajectories can be extrapolated- revealing the history of the Milky Way. Lees meer
SOUNDTRACK: Music by Scott Buckley: https://www.scottbuckley.com.au/library/
- Aurora: https://www.scottbuckley.com.au/library/aurora/
- Petrichor: https://www.scottbuckley.com.au/library/petrichor/
- In Search of Solitude: https://www.scottbuckley.com.au/library/in-search-of-solitude/
- Decoherence: https://www.scottbuckley.com.au/library/decoherence/
- The Things That Keep Us Here: https://www.scottbuckley.com.au/library/the-things-that-keep-us-here/
CHAPTERS:
(00:00) Welcome
(01:49) Our Home Galaxy
(04:37) Mapping the Milky Way
(07:20) Globular Clusters
(09:14) Kraken
(11:00) Gaia-Enceladus
(13:30) NGC-2808
(15:17) Omega Centauri
(16:17) The Sequoia Galaxy
(18:11) The Helmi Stream
(20:32) Sagittarius Dwarf Galaxy
(23:55) Conclusion