NASA's Don Pettit impersonated fellow astronaut Matthew Dominick to show what it's like when two astronauts get to nerd out ...

Many photos McCarthy has taken of the space station in the past show the ship as a silhouette in Earth's shadow. This time he ...

A photograph taken by NASA astronaut Matthew Dominick from the International Space Station shows mysterious ... rare weather event called "red sprites," while the much larger blue orbs are ...

NASA astronauts Don Pettit and Matt Dominick answered questions from the audience and discussed daily life on the ISS.