What was the mysterious white spiral flying in the night sky as stargazers looked up during the Perseid meteor shower peak ...

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

United Launch Alliance completed its first US national security mission with the newly developed Vulcan rocket, a key test of ...

United Launch Alliance lofted an experimental navigation satellite on the first national security mission of its new Vulcan ...

In the near-term, ULA will switch back to launching its soon-to-retire Atlas V rocket, the Vulcan rocket's predecessor. The ...

United Launch Alliance's Vulcan Centaur lifted off for the third time ever in an experimental launch to put navigation ...

Visible across the Northeast, the bright, pill-shaped light was the exhaust plume from the United Launch Alliance's Vulcan ...

The Vulcan, the United Launch Alliance's newer rocket, got off the ground from Florida on its first national security mission for US Space Force.

United Launch Alliance (ULA) is gearing up for a long-awaited comeback, returning to secretive payload lifts for the National ...

Theories suggest the display came from either the European Space Agency's Ariane 6 rocket or the United Launch Alliance's ...

A successful rocket launch this week could mean big things for two large defense companies that co-own the space company.

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