Discover the secrets of 3I/ATLAS, a 7-billion-year-old interstellar comet making its closest approach to Earth on Dec 19.

While NASA's James Webb Telescope and other instruments have already spotted abundant water vapor, carbon monoxide and carbon ...

The interstellar comet will pass safely by Earth, giving astronomers their best chance to study it up close. Interstellar ...

NASA's Hubble Space Telescope has gotten a rare peek at the aftermath of two cosmic collisions — and helped scientists solve ...

Europe’s Ariane 6 successfully launched two Galileo satellites from Kourou, strengthening the EU’s navigation constellation ...

Europe's new Ariane 6 rocket successfully placed two satellites into orbit to join the EU's rival to the GPS navigation ...

ESA images show a large meteoroid strike on Apollinaris Mons, leaving more than 100 mysterious moving dust marks on Mars.