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

When most people think of our Solar System, they think of the 8 planets officially recognized by the International Astronomical Union (IAU). But what if I told you there are at least 40 planets, and ...

For only the third time in recorded history, an interstellar object has crossed into our solar system, creating quite the ...

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

I/ATLAS, earlier known as A11pI3Z, is only the third interstellar visitor to be discovered passing through our corner of the ...

Astronomers are scrambling to gather data on a mysterious object that’s currently hurtling through the solar system.

Astronomers have confirmed the third interstellar object on record is dashing through our solar system. Dubbed 3I/ATLAS, it ...

NASA has made a new out of this world discovery. NASA's James Webb Space Telescope recently captured evidence of a new planet ...

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

I/ATLAS might be over 7 billion years old, a new study reports, which would make it the oldest comet known. But experts caution we need more data.

There's a new interstellar object moving through our solar system and it's called 3I/ATLAS, according to NASA.

The European Space Agency said Wednesday that scientists have discovered what might be only the third known interstellar ...