Einstein's theory of general relativity views time similarly to width, height, and length. As such, both time and space can be curved by gravity. This effectively means that time is slower the closer ...

Oftentimes, we think of space as an endless, mostly empty vacuum, a silent backdrop where planets, stars, and galaxies play out their dance. We also think of time as something separate, a steady ...

Specifically flagged by the UNEP are air pollution from launch emissions, spacecraft emissions in the stratosphere, as well ...

It takes a beam of light a single day to travel 16.1 billion miles, a distance known as a light-day. It'll take Voyager 1, the American spacecraft moving at 10.6 miles per second, more than 49 years ...

ULA's Vulcan is due to send up on Aug. 12 a pair of U.S. Space Force national security satellites on one of the company's most ambitious-ever launches. The Vulcan rocket, which has flown twice before, ...

SpaceX is set to launch its Crew‑11 mission to the International Space Station (ISS) on Thursday (July 31), and the event will stream live online. Here's how and when you can watch it. The Crew‑11 ...

Space Command is responsible for military operations beyond Earth's atmosphere. It's separate from the US Space Force, which is a service branch of the military – like the Army or Navy – responsible ...

CAPE CANAVERAL, Fla. – A resupply mission to the International Space Station hit a snag Monday morning when the Cygnus XL spacecraft experienced an engine shutdown during its approach, NASA officials ...

Researchers discovered sugars essential for biology, including glucose, in the asteroid material for the first time. A strange, pliable substance nicknamed "space gum" was also found, which could have ...