Sky Explorers
Thursday, February 23, 2017
2/23/17: Space Exploration
CC R
e
cording
New Planets Discovered 40 Light Years Away
http://www.planetary.org/blogs/guest-blogs/2017/20170222-trappist-1-potentially-habitable-worlds.html
http://www.trappist.one/#about
How Satellites Stay in Orbit (Video)
Orion Spacecraft and Mission to Mars
Robert Goddard: Rocketry Pioneer
https://archive.org/details/NIX-LV-1998-00114
Apollo Mission to the Moon
Crowd Science: Help Find Planet 9
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