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.

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.

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.

U.S. President Donald Trump on Wednesday issued an executive order to eliminate several environmental regulations to make way ...

The first two Vulcan test flights last year used a configuration of the rocket with two strap-on boosters to add an extra ...

A United Launch Alliance Vulcan rocket is gearing up to carry a classified national security payload into space Tuesday night ...

Depending on weather, trajectory and clouds, the nighttime ULA Vulcan rocket launch from Cape Canaveral, Florida, may be seen ...