Astronauts have run into a glitch with the International Space Station's brand-new room that may delay plans for opening its long-awaited observation deck.

The International Space Station got a bit bigger Thursday thanks to two spacewalking astronauts who helped attach NASA's last major room for the orbiting lab and some new windows.

"It's very difficult to find a black cat in a dark room, ... The mission began 11:12 a.m. EDT Saturday when a SpaceX Falcon 9 rocket roared to life at the Cape Canaveral Space Force Station.

For now, at least, the module won't exactly have a glamorous purpose on-station. NASA will use the additional space to store up to 130 "cargo transfer bags," bags of various sizes first used for ...

Scientists say a $2 billion antimatter-hunting experiment on the International Space Station has detected its first hints of dark matter, the mysterious stuff that makes up almost a quarter of the ...

Two astronauts aboard the International Space Station conducted their fourth and final spacewalk Saturday to finish a series of repairs aimed at extending the functioning of a cosmic ray detector ...

Astronauts are giving the International Space Station’s premier science experiment a life-extending transplant to continue its hunt for antimatter, dark matter, and more ...

Scientists say a $2 billion antimatter-hunting experiment on the International Space Station has detected its first hints of dark matter, the mysterious stuff that makes up almost a quarter of the ...