How Many Planets Are There in the Solar System? There are 8 planets in our solar system. The planets orbit the Sun in elliptical trajectories, and they are all different in size, composition, ...

Nearly a century after Pluto’s discovery, astronomers are still hunting for mysterious planets beyond Neptune - including a ...

New research shows that Theia, the planet that collided with Earth and formed the Moon, was a rocky world born closer to the ...

For the last month and change, you might've seen the headlines about the planetary alignment, or a planetary parade, going on in our solar system. And that's true. In January 2025, Venus, Mars, ...

It is a question that feels like it should have a straightforward answer: how many planets are there in our solar system? Since Pluto was relegated back down to dwarf planet status, almost everyone ...

Astronomers have spotted an intriguing cluster of objects in the Kuiper belt, an enormous, donut-shaped region of icy objects ...

Have you ever looked up at the stars and wondered about the song the universe sings? Perhaps you think the answer is in the hands of poets (or a Doctor Who storyline, at the least). It doesn’t have to ...

Water isn't just delivered to planets by comets and asteroids — it can also be forged as worlds form, a new study finds.

Make room, earthling. We’re moving the other planets in our Solar System into our planetary neck of the woods.