ULA's Vulcan is replacing the company's workhorse Atlas 5 rocket and the already-retired Delta 4 family of launchers.

Nearly five-month mission concludes as agency continues its human presence on the International Space Station.

The United Launch Alliance is launching its powerful Vulcan rocket on its first national security mission for the U.S. Space ...

Instead of a plane that is a long tube, Long Beach-based JetZero is developing a wedge-shaped plane called Z4 that is ...

The X-37B is an experimental test program designed to demonstrate technologies for a reliable, reusable, unmanned space ...

Welcome home,” echoed the voice from SpaceX Mission Control as four astronauts drifted in the Pacific off Southern California ...

The four members of the SpaceX Crew-10 mission climbed aboard the Crew Dragon Endurance and departed the International Space ...

Four astronauts returned to Earth on Saturday after hustling to the International Space Station five months ago to relieve ...

A top Food and Drug Administration official is getting his job back, a spokesman for health agencies said Saturday, less than two weeks after he was ousted at the direction of the White House. Vinay ...

Four space travelers safely splashed down off the coast of San Diego Saturday after completing a mission aboard the ...