A planned spacewalk outside the International Space Station was scrapped because of what NASA called a "medical concern" with an unidentified crew member.

The Gateway, NASA’s upcoming lunar space station, is one step closer to reality as engineers have successfully powered on its solar electric propulsion system, a spacecraft engine designed to orbit and maneuver around the Moon.

Four astronauts are about to become the first humans to venture near the moon in more than half a century since NASA's iconic Apollo era ended.

NASA’s new solar engine powers the Gateway space station, advancing Artemis missions and deep space exploration.

NASA’s Gateway is coming to life with a solar-powered spacecraft built to light it up—and move it around the Moon.

If you thought 2025 was an exciting year for spaceflight, just wait until 2026. Here's a look at six missions that could define the year.

The unnamed crew member is stable aboard the International Space Station, officials said, but needs care on Earth.