SPACE

CubeSats are fascinating learning tools for space
229 points | 83 comments

Celestia – Real-time 3D visualization of space
137 points | 32 comments

Don't build a spaced repetition startup
20 points | 8 comments

Moon helium deal is biggest purchase of natural resources from space
8 points | 6 comments

SpaceX built a docking system from bicycle parts
7 points | 3 comments

Mysterious changes near Earth's core revealed by satellites in space
7 points | 1 comments

SpaceX Starlink satellite photobombs orbital view of secret Chinese air base
7 points | 0 comments