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

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

Pennsylvania residents witness a stunning celestial event: swirling lights in the sky. Discover what caused this mesmerizing ...

ULA Vulcan Launch completes its first National Security Space Launch mission, taking the reins from the Delta IV Heavy for ...

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

Even though the night of Aug. 12 was the peak of the Perseid meteor shower, the light that caught the most attention in West Virginia and across the East Coast wasn’t a fireball.

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

As it turns out, the cause of the strange light was a spacecraft, but not one piloted by little green men. There were two ...

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

The Pentagon has launched its first experimental navigation satellite in nearly five decades, aiming to test out a new ...