NASA

Astronauts face several risks during spaceflight, including exposure to radiation.

NASA astronauts Suni Williams and Butch Wilmore were on the International Space Station more than nine months, despite launching into space in June for what was expected to be an eight-day mission.

Suni Williams and Butch Wilmore were only supposed to be in space for about a week when they launched in June, but problems with their Boeing Starliner spacecraft extended their journey for months.

President Trump launched the Artemis program to return U.S. astronauts to the moon for the first time since Apollo. Now, the plan could be a casualty of the cost-cutting drive overseen by Elon Musk.

A NASA spacecraft knocked into an asteroid two years ago to test planetary defense. Now, a new mission will inspect the damage, with the goal of helping future asteroid deflection.

Butch Wilmore and Suni Williams revealed what life has been like aboard the International Space Station after problems arose with their Starliner spacecraft, which returned home empty last week.

The space agency determined that the material was a metal alloy stanchion used on "NASA flight support equipment."

After a nasty computer glitch five months ago, Voyager 1 is once again able to communicate with Earth in a way that mission operators can understand.

The NASA-backed Nationwide Eclipse Ballooning Project puts students in charge of a bold scientific endeavor to study the April 8 total solar eclipse.

Tom Stafford commanded the first Apollo mission to dock with a Soviet craft in space. He also served as commander of Apollo 10 - the dress rehearsal before NASA's first landing on the moon in 1969.