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NASA just emailed a wrench to space. An astronaut working on the International Space Station needed a tool he didn’t have, so NASA designed one with computer software and emailed the file to him. He then used a 3D printer to create the first object ever designed on Earth and made in space.
If Andromeda were brighter, this is how it would look in our night sky.
Distance to Earth: 2,538,000 light years
They’re all out there, we just can’t see them+
