Satellites reflect sunlight, Earthshine, infrared and radio waves.

A one-of-a-kind mountaintop stargazing experience at a Wyoming ski resort offers cosmic views, cutting-edge tech, and ...

The nova eruptions come about when a white dwarf steals too much matter from a close red giant companion.

There are already tens of thousands of pieces of large debris in orbit, some of which pose a threat to functional satellites.

Comet 3I/ATLAS nears Earth on December 19, 2025. This interstellar visitor displays an unusual green glow. Scientists are ...

The NASA/ESA/CSA James Webb Space Telescope has been exploring the cosmos for 3 years. See some of the amazing highlights.

From a particle smasher encircling the moon to an “impossible” laser, five scientists reveal the experiments they would run ...

NASA's Double Asteroid Redirection Test (DART) impacted the 'moonlet' Dimorphos in the Didymos asteroid system. NASA's Hubble ...

The Webb space telescope observed a supernova that took place when the universe was 730 million years old, setting a new ...

Compelling evidence that the structure of matter surrounding supermassive black holes has changed over cosmic time has been ...

Astronomers have observed the longest-ever gamma-ray burst — a powerful, extragalactic explosion that lasted over seven hours ...

Two new awards totaling $4.8 million will fund next-generation instruments for mid-sized telescopes at Lick and McDonald Observatories, enabling researchers to study how planets and stars form. The ...