Discover interesting facts about the sun, the solar system's central star that supports all life on Earth. Comments ( 0 ) ( ) When you purchase through links on our site, we may earn an affiliate ...

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

How Big Is the Oort Cloud? The inner edge of the Oort Cloud is believed to be between 2,000 and 5,000 astronomical units (AU) from the sun—with one AU equal to around 93 million miles.

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

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

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

Solar System Quiz—Questions. Confusing your Kelvins with your craters? Red spots with gas giants? Our solar system continues to reveal amazing facts and inspire some out-of-this-world fantasy.

How far away it is: 93 million miles (150 million km) ...