The Giant Magellan Telescope project just cast its seventh and final primary mirror segment, a huge milestone that keeps the scope on target to begin operations in the late 2020s.

On Sept. 30, 2016, the European Space Agency's Rosetta spacecraft purposely crashed into a comet.

New photos from Stoke Space show the successful test flight, Hopper2, bringing the company one step closer toward developing fully reusable rockets.

A new class of proteins found in methane deposits on Earth's seafloor could help inform the search for alien life.

The exoplanet K2-18b might host a water ocean.

Self-sustaining chemical reactions that could support biology radically different from life as we know it might exist on many different planets, a new study finds.

The new moon glows in the sky above Turkey with the reflected light of Earth shining upon it in gorgeous photos by astrophotographer Miguel Claro.

This year's final supermoon, September's Harvest Full Moon, rises on Friday, Sept. 29, bringing a summer of supermoons to a close and joined by a planetary parade of Jupiter, Saturn, and Mercury.

Marvel Comics is releasing a set of special "Star Wars Rebels" 10th anniversary comic book covers that celebrate the characters that now appear in the live action series "Ahsoka."