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    After debunking Trump denialism, Neil deGrasse Tyson tackles 'unexplained' flying objects

    11:30

  • Astronomers reveal first image of supermassive black hole at Milky Way’s center

    02:13

  • Russian invasion of Ukraine could infringe on space program's neutrality

    01:37

  • Scientists hold their breath as James Webb Space Telescope deploys with high hopes

    04:37

  • NASA launches James Webb Space Telescope into orbit

    01:10

  • Jeff Bezos's Blue Origin launches third human spaceflight aboard New Shepard

    02:42

  • How one man went from NASA to novelist

    06:26

  • Scientists hope rocket crash offers insight on protecting Earth from asteroid collision

    05:49

  • Dead satellites and space junk plague low-Earth orbit

    01:41

  • Reckless Russia imperils space station with debris from satellite missile strike test

    01:47

  • Russia missile test blamed for space debris that forced astronauts to take shelter

    03:39

  • Retired astronaut Chris Hadfield discusses new book

    05:39

  • 'It's extraordinary': William Shatner grows emotional describing experience on Blue Origin flight

    05:02

  • William Shatner and Blue Origin crew lifts off from Texas

    03:47

  • Inside Blue Origin: What William Shatner will experience before, during his '3 minutes of fun'

    02:49

  • Watch: All-civilian SpaceX flight splashes down off Florida after three days in orbit

    04:13

  • Walter Isaacson: Space travel 'not just a billionaires boys club' now

    04:53

  • SpaceX makes history launching all-civilian crew into orbit

    04:00

  • Watch SpaceX rocket launch first all-civilian crew into orbit

    06:00

  • Former NASA administrator explains what Inspiration4 crew training may have looked like

    04:17

NOW With Alex Wagner

NASA: Evidence of liquid water on Mars

00:46

NASA found evidence of liquid water under the surface of Mars. Meanwhile, Space X’s rocket took off with an espresso machine for the ISS.April 14, 2015

  • UP NEXT

    After debunking Trump denialism, Neil deGrasse Tyson tackles 'unexplained' flying objects

    11:30

  • Astronomers reveal first image of supermassive black hole at Milky Way’s center

    02:13

  • Russian invasion of Ukraine could infringe on space program's neutrality

    01:37

  • Scientists hold their breath as James Webb Space Telescope deploys with high hopes

    04:37

  • NASA launches James Webb Space Telescope into orbit

    01:10

  • Jeff Bezos's Blue Origin launches third human spaceflight aboard New Shepard

    02:42

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