They’re not a perfect match, but it’s way too hot on the first planet for us to hop over and confirm for ourselves.

Ancient meteorite reveals a protoplanet formed in the outer Solar System earlier than thought, reshaping planet formation ...

Meteorites from Mercury have never been found on Earth. But two pieces discovered in the Sahara desert might be remnants of ...

Just the third-ever confirmed interstellar object has been detected in our solar system. Here's what we know. (Spoiler: It's ...

Rocky bodies called protoplanets were thought to have formed slightly earlier in the inner solar system than those beyond the ...

A small, inconspicuous meteorite may be about to change our understanding of how and when our solar system formed. Tiny shavings from the meteorite Northwest Africa 12264 are challenging the long-held ...

An object dubbed 3I/ATLAS is only the third interloper from outside the Solar System seen in all of human history.

A fascinating glimpse into how a solar system like our own is born has been revealed with the detection of planet-forming ...

Astrophysicist Josep Trigo-Rodriguez of the Institute of Space Sciences near Barcelona, Spain, believes it is an interstellar ...

For only the third time in history, astronomers have detected a new interstellar visitor — an object from another star — blitzing into our solar system.