Season 2
15 episodes · Mar 20, 2018
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S2E1Earth: The Secret History
Mar 20, 201843mAstronaut Mike Massimino uses the latest science to reveal the strange secrets of planet earth, and explores whether alien earths exist elsewhere in the universe.
S2E2Alien Planets: Cosmic Nightmares
Mar 27, 201843mAstronaut Mike Massismino uncovers the violent secrets of the most deadly planets outside our solar system.
S2E3Milky Way: The Monster Inside
Apr 3, 201843mAstronaut Mike Massimino explores the dark secret of the Milky Way, the home to both Earth and a terrifying supermassive black hole.
S2E4Ends of the Solar System: Strange Frontiers
Apr 10, 201843mAstronaut Mike Massimino uses the latest NASA discoveries to explore the dark and mysterious frontiers of our solar system.
S2E5Ice Giants: The Frozen Aliens
Apr 17, 201843mAstronaut Mike Massimino journeys to Uranus and Neptune, the farthest planets from the sun and the home to some of the solar system's strangest mysteries.
S2E6Alien Galaxies: The Strange Secrets
Jul 24, 201843mAstronaut Mike Massimino explores the universe's strangest alien galaxies, strange places that could be home to extraterrestrial life and deadly supermassive black holes.
S2E7Mercury: The Cursed Planet
Jul 31, 201843mAstronaut Mike Massimino explores Mercury, a deadly and tiny planet that faces constant attacks from the Sun, and which might one day pose a threat to all life on Earth.
S2E8Comets: Mysteries from the Deep
Aug 7, 201843mAstronaut Mike Massimino reveals the alien secrets of comets, strange visitors from deep space that might be responsible for life on Earth.
S2E9The Sun: Secrets of Our Star
Aug 14, 201843mAstronaut Mike Massimino journeys to the sun, revealing the secrets of Earth's star and how it will one day destroy the planet.
S2E10The Solar System: Alien Origins
Aug 21, 201843mAstronaut Mike Massimino uncovers the strange and violent birth of the solar system, and reveals how its planets were built from the wreckage of bygone alien worlds.
S2E11Dwarf Planets: Aliens Among Us
Aug 28, 201843mAstronaut Mike Massimino explores dwarf planets, mysterious worlds like Pluto that are too small to be a planet, but are home to some of the universe's biggest secrets.
S2E12Alien Stars: Mystery of the Monsters
Sep 4, 201843mAstronaut Mike Massimino journeys to the deadliest stars in the universe, where terrifying suns can rip apart planets but may be integral to life on Earth.
S2E13Alien Volcanoes: Life in Hell
Sep 11, 201843mAstronaut Mike Massimino uses the latest science to explore the alien volcanoes of distant worlds and reveals if they are hotbeds for extraterrestrial life.
S2E14Alien Moons: The Next Earth
Sep 18, 201843mAstronaut Mike Massimino journeys to the alien moons of the solar system and discovers if these strange worlds could be habitable for life beyond Earth.
S2E15Alien Oceans: Search for Life
Sep 25, 201843mAstronaut Mike Massimino explores the mysterious oceans of the solar system, where the latest discoveries provide new clues in the search for alien life.