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S4E1 Back to the Moon with Artemis
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…
S3E3 Voyager: Beyond the Solar System (Probes Episode #3)
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.…
S3E2 Journey to the Gas Giants (Probes Episode #2)
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…
S3E1 Race to the Terrestrial Planets (Probes Episode #1)
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…
S2E15 The Final Age of the Solar System (Part 2)
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,…
S2E14 The Birth of the Solar System (Part 1)
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…
S2E13 The James Webb Telescope (2022 Version)
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…
S2E12 When Black Holes Collide
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…
S2E11 Dwarf Planets: Lesser Worlds
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…
S2E10 The Oort Cloud: The Solar System's Shell
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…
S2E9 Moons Beyond the Solar System
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.…
S2E8 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…
S2E7 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,…
S2E6 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…
S2E5 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…
S2E4 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…
S2E3 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…
S2E2 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…
S2E1 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…
S1E15 Beyond the Observable Universe
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…
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SEA: Space Exploration & Astronomy has published 34 episodes since November 2025, covering topics in Astronomy, Science.
SEA: Space Exploration & Astronomy is currently highly active with new episodes weekly. Average episode length is 31m.
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