Calla Cofield

A massive, glowing bubble of light erupted in the sky above northeastern Siberia, which may have been created by a test missile launch.

Bright galaxies in the center of massive galaxies clusters wobble more than scientists anti

There's a toxic ice cloud lurking over Saturn's moon Titan.

The discovery of water plumes on Enceladus led to the revelation that this tiny ice ball could host a habitable environment under its surface. But scientists almost didn't find the plumes at all.

Why does DARPA want to build a reusable space plane? An agency representative explains what small satellites have to do with national defense.

NASA's Dawn spacecraft has been granted a mission extension that will allow it to continue to study the dwarf planet Ceres until it runs out of fuel sometime in 2018.

NASA is using information from Earth-observing satellites to assist in recovery efforts following a series of devastating wildfires in northern California.

Subramanyan Chandrasekhar, the namesake of NASA's Chandra X-ray Observatory, is honored today (Oct. 19) in a Google Doodle. Chandrasekhar did revolutionary work on the life and death of stars.

The era of multi-messenger astronomy has officially begun. But what does that phrase mean, and how will it change the study of the cosmos?

Virgin Galactic founder Richard Branson most likely won't be going to space in the next six months, despite his recent public statement that he'd be "very disappointed" otherwise.

What role will NASA play in getting humans to Mars, and when will the agency depend on participation from commercial companies? A top NASA official discusses the agency's plans.

SpaceX successfully launched 10 communications satellites into low-Earth orbit today (Oct. 9) and landed the spent Falcon 9 rocket booster on a drone ship.

College senior Steven Stetzler got to meet real NASA astronauts and consider a possible future working for NASA, thanks to a nonprofit organization founded by NASA's very first astronaut class.

There's a big gravitational-wave announcement coming later this month, but insiders won't reveal any details. Here are our educated guesses about what the collaboration will reveal.

A NASA/NOAA satellite captured images of Puerto Rico that reveal regions that are without power, due to Hurricane Maria. The images were then used to assist first responders on the island.

The spaceflight company unveiled a tantalizing design for a reusable, single-stage surface lander called the Mars Ascent/Descent Vehicle (MADV).

Artist Trevor Paglen and the Nevada Museum of Art want to launch the first-ever satellite with the sole purpose of existing as a work of art.

The NASA Disasters Program is using data from Earth-observing satellites to assist relief efforts in Puerto Rico, which was devastated by Hurricane Maria last week.

It's the first day of autumn in the northern hemisphere, but the astronauts on the International Space Station wore summery Hawaiian shirts, and posed for some stylish photos.

The Cassini mission at Saturn lasted more than twice as long as it was supposed to. What's the secret to its long life?