Determining the expansion rate of the universe, a number called the "Hubble constant," shapes our entire understanding of the cosmos, its age, and its ultimate fate.

What’s old is new again. NASA scientists discovered an underground “city” buried 100 feet beneath the ice of Greenland.

Iceland is no stranger to volcanos. In fact, as a volcanic island shaped by the magma rising out of the mid-ocean ridge it ...

Brian Greene (Cosmic String Theory) and Astrophysicist Ethan Siegel have collaborated on a National Geographic coffee-table ...

Near Space Labs’s autonomous balloon fleet is already taking high-resolution images of the ground, and its range will expand ...

New images show the rapidly rotating pulsar of the "Guitar Nebula" shooting out a gigantic cosmic plume of plasma, X-rays and ...

Delhi has been battling hazardous air this month, with the air quality index (AQI) touching a peak of 494 on a scale of 500, ...

SpaceX plans to launch yet another batch of its Starlink internet satellites from Florida's Space Coast early Tuesday morning ...

NASA's NEOWISE telescope ended its journey through space in November when it re-entered Earth's atmosphere and burned up ...

The ambitious and top secret project was supposed to withstand a first strike by the Soviet Union, but it ultimately couldn't ...

Scientists now have a clearer picture of Camp Century, an abandoned U.S. military base long hidden under the ice in Greenland ...

The discovery occurred while the NASA team was testing the Uninhabited Aerial Vehicle Synthetic Aperture Radar (UAVSAR) ...