Our solar system used to have nine planets ... “In terms of scientific viability, we know that there are eight planets already, so it’s not so crazy to have another planet within the same ...

A large planet has been spotted orbiting a dwarf star that is just 3 million years old, offering possible clues to how the ...

On a clear night, several planets in our solar system were visible without a telescope. However, as telescopes increased in sophistication, astronomers discovered more planets, confirming the eight in ...

Forming an estimated 3 million years ago, the planet discovered by astronomers at the University of North Carolina is in its ...

You may need binoculars or a telescope for this one. It includes the three furthest planets in our solar system.

The largest celestial bodies in our solar system that still exist—massive asteroids and minor planets—are thought to be the last vestiges of this era of planetary formation. This is the period ...