Video library
Space, seen
in motion.
Browse videos from GreenSpacealien - Quiet Cosmos. Collections here are editorial groupings; public YouTube playlists are listed separately below.
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Quiet Cosmos
Long-form journeys and calm explorations of the universe.
Cosmic Dawn: How We Read the Universe’s First Light | Quiet Cosmos
Watch videoHow We Know Other Worlds Are There | Exoplanets | Quiet Cosmos
Watch videoBennu’s Sample: What Asteroid Dust Can Tell Us | Quiet Cosmos
Watch videoWhy Do Many Galaxies Rotate So Fast? | Quiet Cosmos
Watch videoHow Far Can We Actually See? | Quiet Cosmos
Watch videoThe Moon Changed Earth—and Earth Changed the Moon | Quiet Cosmos
Watch videoWhy Venus’s Sky Outruns Its Planet | Weather Beyond Earth | Quiet Cosmos
Watch videoHow Do We Map a Galaxy We Can’t Leave? | Quiet Cosmos
Watch videoThe Sun Reaches Far Beyond Daylight | Solar Wind, Auroras, and Space Weather | Quiet Cosmos
Watch videoThe Oceans We Cannot See: How We Find Hidden Seas Beyond Earth | Quiet Cosmos
Watch videoThe Entire History of Mars | Quiet Cosmos
Watch videoHow Satellites Quietly Shape Your Day | Quiet Cosmos
Watch videoThe Entire Life of a Black Hole | From Birth to the End of Time | Quiet Cosmos
Watch videoThe Entire Life of a Star | From Nebula to White Dwarf or Black Hole | Quiet Cosmos
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Other explainers & deep dives
Space science, missions, and ideas explored in depth.
Hubble: The First Repair
Watch videoRosetta and Philae: Landing on a Comet
Watch videoWhy Webb Needs a Sunshield—and a Refrigerator
Watch videoCan a Labyrinth Seal Help Keep Space Lubricant in Place?
Watch videoWhy Astronauts See Flashes With Their Eyes Closed
Watch videoHow Reaction Wheels Turn a Spacecraft
Watch videoApollo 13: How the Crew Got Home
Watch videoHow Does a Spacesuit Keep You Alive?
Watch videoWhy Do Rockets Work in a Vacuum?
Watch videoOrganized for discovery