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Airglow: Why The Night Sky Is Really Green

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Hosts Hank Green, Caitlin Hofmeister and Reid Reimers share everything from just after the beginning of time to the most recent breaking news in space exploration.

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airglow auroras radiation atmosphere light green night sky uv ultraviolet oxygen molecules atoms orbitals orbits emissions red blue ground-state altitude observation skywatching space astronomy sci-show-space hank-green science 3rdpartyimport

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SciShow Space

Our Next Mission to Mars, and How the Sun Will Kill the Internet 00:03:54
Launching ExoMars! 00:03:24
Photonic Propulsion: Mars in 3 Days? 00:04:48
Help Us Survive on Mars, and Name Your Own Planet! 00:03:31
How Long Would You Survive on Mars? 00:02:44
Terraforming: Can We Turn Mars Into Earth 2.0? 00:04:23
Dry New Planets and The Search for Dirty Aliens 00:03:26
What's Up With the 'Alien Megastructure?' 00:03:46
Rosetta Didn't Find Aliens! 00:03:11
Curiosity's Sequel, and the Key to Finding Alien Life 00:04:04
8 New Earth-Like Planets Discovered! 00:03:27
The Wow! Signal 00:03:44
The Fermi Paradox and Our Search for Alien Life 00:03:57
Astronaut Weightlessness Training 00:04:15
2 Weird Experiments in Human Space Flight 00:03:33
NASA Needs Astronauts! 00:03:43
What We Learned from Challenger and Columbia 00:04:14
The Year-Long Twin Astronauts Experiment 00:03:39
How Do Astronauts Do Their Business? 00:03:30
The Unexpected Effects of Nukes in Space 00:04:15
How Carl Sagan Predicted Nuclear Winter 00:04:25

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