Measurements of this interstellar comet’s molecular makeup show an excess of heavy water molecules that is dramatically ...

NASA has confirmed that its Perseverance rover captured the first-ever images of an interstellar object from the surface of another planet, photographing comet 3I/ATLAS during a coordinated ...

3I/ATLAS is not just another comet drifting by. This object likely formed around another star, may be older than our Sun, and ...

ALMA reveals unusual “alien” water in interstellar comet 3I/ATLAS, showing it formed in an extremely cold, distant star ...

Less than a year ago, astronomers discovered a comet soaring through our sky that was not from our solar system. Although we ...

This artist’s impression compares the semi-heavy water content of the interstellar comet 3I/ATLAS (left) and Earth (right).

Scientists and NASA officials insist the object is a natural comet, not alien technology. Recent observations found no radio signals from the comet that would suggest it was artificial. The comet made ...

Scientists studying 3I/ATLAS have detected unusually high levels of heavy water, indicating it formed in an extremely cold ...

Astronomers say that there are possible signs of life on Comet 67P, based on data from the European Space Agency's Philae Lander. The comet has features that indicate it may be home to alien life, ...

A mysterious interstellar comet older than the Sun is exposing alien chemistry and rewriting astronomy as we know it.