Turkey’s first astronaut along with a Swede and Italian launched Thursday to the International Space Station on a chartered SpaceX flight.

NASA’s experimental Mars helicopter rose from the dusty red surface into the thin air Monday, achieving the first powered, controlled flight on another planet.

SpaceX’s swanky new crew capsule made an old-fashioned splashdown in the Atlantic on Friday, ending a six-day test flight to the International Space Station. The Dragon capsule pulled away from the orbiting lab early Friday. Six hours later, the capsule carrying a test dummy parachuted into the ocean, a couple hundred miles off the Florida coast. SpaceX employees cheered and...

A NASA spacecraft 4 billion miles from Earth yielded its first close-up pictures Wednesday of the most distant celestial object ever explored, depicting what looks like a reddish snowman. Ultima Thule, as the small, icy object has been dubbed, was found to consist of two fused-together spheres, one of them three times bigger than the other, extending about 21 miles...