[roadcat]

I wonder, have any astronauts done 3D printing in Outer Space? It just seems to be a good fit, printing objects with minimal effects of gravity, reducing or eliminating the need for support structures.

This would reduce the need for sending finished objects into space. All they would need is abundant supplies of materials to feed the printer engine (and spare parts for the 3D printer). Broken rocket nozzle? Astronauts could print a replacement while in space.

[Ellendra]

I wonder, have any astronauts done 3D printing in Outer Space?

Yes, they have. As I recall, the first item they printed was a wrench.