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

The planets in order from the Sun are Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. If you include the ...

– Gavriel, age 10, Paducah, Kentucky A cloud of collapsing gas created our Sun, the first thing to form in our solar system. This happened about 4½ billion years ago. Then the planets began to ...

Astronomers have observed an object that originated from beyond our solar system, thought to be an interstellar comet, ...

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

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

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

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

A new interstellar object, A11pl3Z, has been discovered in our solar system, marking the third such object to be observed. It ...

This process, called accretion, is how everything in the solar system – planets, moons, comets and asteroids – came into being. Telescopes can see young solar systems being born.

An "interstellar object" is speeding toward the inner solar system, where Earth is located, astronomers have confirmed.