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 ...

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.

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.

An object from another star has been seen entering the solar system at high speed, and is expected to whip around the sun in ...

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

– 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 ...