Comet 3I/ATLAS, the third interstellar object ever detected, reached its closest point to Earth overnight from Thursday to Friday (Dec. 18 to 19), and it remains in a good viewing position tonight.

A comet that was discovered in January will make its closest approach to Earth on Tuesday. If you don't see it this time around, the only way to see it again is with the help of time travel because it ...

Forbes contributors publish independent expert analyses and insights. An award-winning reporter writing about stargazing and the night sky. Here’s a final call for anyone who wants to see two green ...

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.