Add Yahoo as a preferred source to see more of our stories on Google. One thing about 3I/ATLAS is for certain: It's definitely not from Earth's solar system. But what exactly is the intriguing ...

A comet that is likely much, much older than our solar system has spent months traipsing through Earth's cosmic neighborhood. And at long last, NASA has unveiled an unprecedented look at the object, ...

A team of astronomers found no radio signals from the comet that would suggest it is an extraterrestrial spaceship. The comet was confirmed in July 2025 as the third known object to enter our solar ...