Irene Klotz

Spaceflight provider Orbital ATK lost a bid to stop DARPA from partnering with a competing company to demonstrate in-space satellite-servicing technology.

The Trump administration will seek a heavier emphasis on human-spaceflight efforts, including crewed missions to the moon and Mars, Vice President Mike Pence said today (July 6).

NASA is salvaging technology from a scrapped asteroid mission to help build a space station orbiting the moon.

NASA engineers are working on a nuclear fission system called Kilopower that would power a human colony on Mars.

A group of lucky astronomy buffs will get to watch the moon block the face of the sun on Aug. 21 from 35,000 feet (10,700 meters) in the air aboard a special charter Alaska Airlines eclipse flight.

SpaceX nailed its second launch in three days today (June 25) with liftoff of a Falcon 9 rocket from Vandenberg Air Force Base in California carrying 10 satellites owned by Iridium Communications.

One day after putting Bulgaria's first communications satellite into orbit, SpaceX is preparing for a Falcon 9 launch from Vandenberg Air Force Base in California on Sunday (June 25).

SpaceX is ramping up for its eighth flight of the year on Monday (June 19) with the launch of a communications satellite for Bulgaria aboard a previously flown Falcon 9 booster.

A KFC ad campaign that will place a chicken sandwich on a World View stratospheric balloon has covered a significant portion of the cost of the test flight.

The discovery of a vast star-like disk of gas and dust surrounding planet OTS44 challenges the notion of what differentiates a planet from a star, and of how their origins differ.

When Rocket Lab's small satellite launcher blasts off from New Zealand next week on its debut test flight, it will be more than just the Electron rocket that is on trial.

A Space Launch System (SLS) fuel tank needed for structural tests in advance of the debut flight of NASA's heavy-lift booster was damaged on May 3, the space agency said today (May 11).

Radiation exposure is among the top health risks for Mars astronauts, but the Red Planet poses many other dangers as well. Here are the fastest ways Mars would kill an unprotected traveler.