An object older than the solar system is crossing familiar planetary territory, and spacecraft built for entirely different missions are turning into a makeshift deep-space observatory to study it.

Add Yahoo as a preferred source to see more of our stories on Google. An artist's conception of Centaur 29P/Schwassmann-Wachmann 1 outgassing material into space. There's a class of objects journeying ...

Interstellar comet 3I/ATLAS has gone from a faint, anonymous smudge in survey data to one of the sharpest imaged visitors ever seen from beyond the solar system. The latest high resolution views are ...

Add Yahoo as a preferred source to see more of our stories on Google. A view of HOPS-315, a baby star some 1,400 light-years from Earth where astronomers have observed evidence for the earliest stages ...

Discover the powerful volcanic eruptions that have shaped worlds across our solar system. Around our solar system, violent eruptions are shaping distant worlds. Discover the explosive forces that ...

Meet the surprising, oddball worlds moving around our solar system. From meteorites that impact Earth, to a moon that orbits backwards, to an imposter lurking in the asteroid belt, a variety of ...

Eleven objects found at the extremities of the solar system could mark the location of a 'Kuiper Belt 2.' When you purchase through links on our site, we may earn an affiliate commission. Here’s how ...