While many Southwestern Pennsylvania residents were looking skyward Tuesday night to catch a glimpse of the Perseid meteor ...

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

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

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 ...

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

PHILADELPHIA -- People who had their eyes to the sky for the Perseid meteor shower on Tuesday night had an extra sight to see ...

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

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

National Weather Service staff at its Moon office got a few odd calls Tuesday night about a strange-looking blue swirl moving across the sky. “We had a couple of calls on the overnight shift,” said ...

The United Launch Alliance launched a Vulcan rocket Tuesday night from Florida as part of the first U.S. Space ...