The eight planets in our solar system orbit the sun in roughly the same plane, because they all originally formed from the ...

The solar system is like a big family, with the Sun as the parent and the eight planets as siblings. Each planet is unique, such as Mercury is the smallest and closest to the Sun. Earth is the ...

All eight of the solar system’s “major” planets appear in this illustration, but the actual number of planetary bodies orbiting our star is far greater.

For a few evenings around 28 February, every planet in the solar system will be visible in the night sky, thanks to a rare great planetary alignment. Here's how to make sure you don't miss this ...

Don't worry though—it's not like one planet simply fell out of the solar system. We'll explain what happened and also show you some tricks for remembering the order of all of the planets that ...

NASA telescopes in Chile have discovered a comet from interstellar space, making its closest approach in October.

Thus, only five planets will remain in our solar system." The chances are worse for all eight planets aligning within 1 degree of sky. According to Meeus, "this will occur, on average, every 13.4 ...

The Sun is orbited by eight planets, at least five dwarf planets, tens of thousands of asteroids, and around three trillion comets and icy bodies. Although not all objects of the solar system are ...

Close stellar encounters could change the structure of our planetary system, potentially dooming Earth or other worlds to ...

The planet parade is not an extremely rare occurrence — it tends to happen at least every couple of years. In fact, the eight-planet alignment last happened in June .