The Sun, our life-giving star, is slowly dying. In about 5 billion years, it will exhaust its fuel and transform into a red giant, altering the solar system forever. But long before that, the Sun’s ...

Close stellar encounters could change the structure of our planetary system, potentially dooming Earth or other worlds to ...

Neptune stands stationary against the background stars of Pisces the Fish at 11 A.M. EDT. The solar system's most distant ...

New research says that Earth could be ejected from our solar system if a passing star was to come close enough.

Stars passing close to the sun could cause planets to collide, including with Earth, or even be ejected as rogue planets, new ...

I/ATLAS is only the third interstellar object ever detected. You can stream the object live today, or maybe see it from your ...

Sedna will make its closest approach to the Sun in 2076, giving us a rare opportunity to visit the planetoid before it drifts ...

Astronomers discovered that C/2014 UN271, a massive comet more than 10 times larger than any known comet, is emitting jets of ...