SEA: Space Exploration & Astronomy

SEA
  • 5.0 (8)
  • ASTRONOMY
  • UPDATED WEEKLY

I make chilled-out "info-tainment" videos on all-things space related, from the moment of the Big Bang to the end of the universe itself- and everything in between. No AI, written, recorded and produced by a real human. New episodes every Sunday!

  1. Europa: A Frozen Oasis

    2D AGO

    Europa: A Frozen Oasis

    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. 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

    23 min
  2. Corrupted Stars: Hypothetical Stars that Defy Explanation

    MAR 15

    Corrupted Stars: Hypothetical Stars that Defy Explanation

    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. 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

    25 min
  3. Ghost Galaxies

    MAR 8

    Ghost Galaxies

    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. 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

    15 min
  4. The Mind-Blowing Scale of Voids & Supervoids

    MAR 1

    The Mind-Blowing Scale of Voids & Supervoids

    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! 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

    16 min
  5. Large Quasar Groups

    FEB 22

    Large Quasar Groups

    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. 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

    32 min
  6. The Largest Star (2021 Version)

    FEB 15

    The Largest Star (2021 Version)

    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. 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 LibraryCHAPTERS: 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

    27 min
  7. The Great Attractor

    FEB 8

    The Great Attractor

    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. 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?

    30 min
  8. The Cosmic Scale

    FEB 1

    The Cosmic Scale

    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. 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

    33 min
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5
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8 Ratings

About

I make chilled-out "info-tainment" videos on all-things space related, from the moment of the Big Bang to the end of the universe itself- and everything in between. No AI, written, recorded and produced by a real human. New episodes every Sunday!

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