One year ago, on July 1, 2025, astronomers discovered a fascinating new object moving through the solar system. Detected by the Asteroid Terrestrial-impact Last Alert System (ATLAS), the object was ...

Based on evidence collected by the James Webb Space Telescope, researchers have found that interstellar comet 3I/ATLAS could ...

Based on the composition of gases spewed by the icy space rock, researchers estimate that our guest might be up to 12 billion ...

Strange interstellar comet speculated to be alien spacecraft is older than Solar System - Scientists say comet represents ...

Exactly where the comet 3I/ATLAS came from within the Milky Way remains a mystery.

Astronomers studying the intriguing comet 3I/ATLAS on Monday said that this visitor is incredibly ancient, potentially nearly ...

The outer solar system once seemed like a quiet backwater. But a glut of tiny, strange moons with unruly orbits are coming into view, revealing hints of a surprising past – and the origin of Saturn's ...

Astronomers have discovered a rare in-sync solar system with six planets moving like a grand cosmic orchestra, untouched by outside forces since their birth billions of years ago. The find, announced ...

It may not feel like it, but everything in the universe is in constant motion. Our Sun, with all its planets, orbits the center of the Milky Way, flying through the cosmos at around 450,000 miles per ...

PARIS, France — An interstellar comet that blazed past the Sun last year could be nearly three times older than our Solar ...