NASA astronaut Don Pettit has snapped a striking shot of the super-bright comet racing past our planet for the first time in ...

But imagine jumping off something even higher, like the International Space ... a station, but it's hardly stationary. It's actually moving 12 times faster than a jet fighter. If you shot anything ...

NASA's two stuck astronauts took their first spacewalk together Thursday, exiting the International Space Station almost eight months after moving in.