The pair of NASA astronauts who have been in space for over nine months returned to Earth Tuesday after a new crew to replace them reached the ISS over the weekend.

Some curious dolphins seemingly wanted to give a personal “welcome home" to the Crew-9 astronauts, moments after they splashed down off the coast of Florida on Tuesday afternoon.

NASA and SpaceX made another attempt on Friday to send a crew up to the International Space Station (ISS) and begin the ...

NASA astronauts have returned to Earth after nine months in space. Astrophysicist Adam Frank joins MSNBC's Ari Melber. (The ...