The comet 3I/ATLAS arrived in the solar system with a reputation for being unruly, but its latest trick has stunned even ...

Are they rocky fragments or something else?” Avi Loeb, an astrophysicist at Harvard, asked about the interstellar comet 3I/ATLAS. His question fired up one of the most intriguing debates in planetary ...

Stars form in massive clouds of gas called molecular clouds. As they form, they accrete gas from these clouds, and as the ...

Our planet’s magnetosphere has seen dramatic shifts across its history—even total reversals—but this recent wrinkle doesn’t ...

With Trump’s budget knife still poised over NOAA’s climate research operations, international researchers see a reduced role ...