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SPACE
CubeSats are fascinating learning tools for space
229 points
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83 comments
Celestia – Real-time 3D visualization of space
137 points
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32 comments
Don't build a spaced repetition startup
20 points
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8 comments
Moon helium deal is biggest purchase of natural resources from space
8 points
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6 comments
SpaceX built a docking system from bicycle parts
7 points
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3 comments
Mysterious changes near Earth's core revealed by satellites in space
7 points
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1 comments
SpaceX Starlink satellite photobombs orbital view of secret Chinese air base
7 points
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0 comments