I/ATLAS is definitely a comet, not an alien spacecraft, but it is only the third confirmed interstellar object detected in ...

In an unprecedented celestial event, NASA's Hubble Space Telescope (HST) captured the dramatic aftermath of colliding space ...

NASA's Stardust mission was the first to bring back material from beyond the Moon — particles collected directly from a comet moving faster than 13,000 miles per hour. The spacecraft tracked and ...