Nor is it ever for astronauts, as the Columbia disaster reminds us.

Under current plans, neither module could provide life support services for astronauts.

It is the real thing, made for Russian astronauts.

The previous bunker was more difficult for astronauts to reach.

"Turns out they really were landing pads for ancient astronauts."

The idea is for Russian astronauts to conduct an internal space walk.

After nearly a year of a full tank, the procedures were ready for suited astronauts.

If one could do that, it would have many advantages for astronauts.

For astronauts in 1970, such a mission was almost routine.

This discovery helped to create a safe food supply for astronauts.