Add Yahoo as a preferred source to see more of our stories on Google. On Dec. 19, "this erratic wanderer will be the closest to Earth that it will ever be over the lifetime of the entire universe," ...

Add Yahoo as a preferred source to see more of our stories on Google. Today is the day that astronomers, amateur stargazers and alien conspiracy theorists alike have been waiting for: interstellar ...

Interstellar comet 3I/ATLAS has steadily been making its exit ever since it had a rendezvous at the end of October with the sun.

The mystifying 3I/ATLAS interstellar comet is blazing toward Earth and will in a matter of days come as close to our planet as it ever will. The impending cosmic rendezvous – if you want to call it ...

An ancient comet discovered in our solar system this summer is offering a rare opportunity to learn more about distant planetary systems far beyond the reach of any spacecraft, researchers say. The ...

Mysterious interstellar object 3I/ATLAS made its closest approach to Earth on December 19, coming within just 167 million miles. Scientists have been closely monitoring the object — which is largely ...