That community recently came together to observe Comet C/2023 A3 (Tsuchinshan-ATLAS) as it passed through the night sky. Near ...

A University of Arizona-led team using a camera orbiting Mars has captured the closest images yet of an interstellar comet so rare that it has sparked wild speculation about its alien origins. The ...

Scientists are uncovering new clues that a cosmic explosion may have rocked Earth at the end of the last ice age. At major Clovis-era sites, researchers found shocked quartz—evidence of intense heat ...

Astronomers found no radio signals from the comet that would suggest it is an extraterrestrial spacecraft. 3I/ATLAS was confirmed as the third known object to enter our solar system from interstellar ...