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.

A decade of returning franchises and wonderfully new beginnings.

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