NASA astronaut Jessica Meir and ESA astronaut Sophie Adenot replaced a camera and a docking aid during a 6-hour, 49-minute spacewalk outside the International Space Station on Tuesday (Sept. 1).

Studying 75 meteorites falling to Earth, scientists have identified the seven stages a space rock goes through as it crashes through our atmosphere.

The Fermi Explorer Mission plans to launch a small, cheap probe to Alpha Centauri in the next few years, to inspire further exploration and help humanity contemplate its place in the universe.

On Sept. 1, 1979, NASA's robotic space probe Pioneer 11 became the first spacecraft to fly by Saturn. Here's why it mattered.

Some stars encounter supermassive black holes and live to tell the tale. New research shows why the flares these encounters cause dim over repeated episodes.

NASA's Roman space telescope, which launched on Aug. 30, is part of a small set of missions named after female historical figures.