NASA astronaut Don Pettit captured this stunning long-exposure view of Earth and stars from space at night from the International Space Station.

NASA is targeting Tuesday at 5:57 p.m. EDT for the return of Starliner astronauts Butch Wilmore and Suni Williams.

SpaceX and other companies plan to launch tens of thousands of satellites, which could mar astronomical observations and pollute the atmosphere.

Wilmore and Williams, both former U.S. Navy test pilots, expected to remain in orbit for about 10 days on the mission, which was called Crew Flight Test (CFT). The main goal was to show that Starliner ...

How do we power missions in the outer reaches of our solar system and beyond? The solution, developed in the '60s, can last ...

All societies have had ways of understanding nature based on their experiences of it. For example, farmers need to understand the seasons and weather to know when to plant and harvest their crops.

"As soon as we can get it going, we would want to start having some type of presence on the moon sustainably," she told ...

A pair of NASA astronauts are finally returning to Earth today after they were marooned aboard the International Space Station for over nine months ...

A combination of cosmic processes shapes the formation of one of the most common types of planets outside of our solar system, according to a new study.

A pair of NASA astronauts unexpectedly stuck in space for more than nine months were hours away from returning to Earth on ...

The spacecraft carried out the longest commercial operation on the moon to date—and also made history during its rare chance ...

The Canadian-built Atacama Cosmology Telescope in the high Chilean desert mountains, which has just given up its final batch ...