In the leading model of cosmology, most of the universe is invisible: a combined 95% is made of dark matter and dark energy.

Proliferating satellites are beginning to harm the science work of the beloved Hubble Space Telescope and other observatories ...

Satellite constellations are a relatively new threat to astronomy; prior to the drop in launch costs driven by SpaceX’s ...

Find out what's up in your night sky during December 2025 and how to see it in this Space.com stargazing guide.

On most nights, city skies hide the stars. Streetlights, buildings, and cars fill the air with artificial glow that drowns ...

A covert constellation of military satellites built by SpaceX for the United States government has quietly grown into a fleet ...

A good satellite tracker app can turn your phone into a personal guide to the cosmos, showing you everything from the ...

If you're a fan of stargazing, make sure you have your eyes to the skies this week. A leading astronomer has uncovered six brand new constellations over Britain – and they're all named after delicious ...

Alligator Alcatraz is causing light pollution in one of the first designated "dark skies" in the eastern United States.

Astronomy day 2025 is upon us! To celebrate, we've picked six targets to emphasize the variety and scale of objects visible in the night sky that will make for a beautiful and rewarding sight, whether ...