When you look at the solar system, you might notice that the planets' orbits are tilted, and oddities in the protoplanetary ...

Could a lonely planet wander aimlessly through the restless galaxy change the subtle dance of gravity within our solar system? Astronomers have new cause to investigate. With powerful telescopic ...

There are a couple of ways that scientists can date planets, so which planets formed first in our solar system?

The workings of our solar system are roughly the same now as they have been for millions of years. Moons circle their planets, the planets circle the sun, the sun’s magnetic fields and sunspots wax ...

With a diameter of 88,846 miles at its equator, Jupiter is the biggest planet in our solar system. It’s eleven times larger than Earth, so big in fact that its gravitational forces are thought to be ...

A new study suggests yet another theory for a possible extra planet in our solar system, likely of a size between Mercury and ...

We all need some space sometimes—but it's harder to find than you might think. How far into our universe do we have to go to ...

Our solar system is a smashing success. A new study suggests that from its earliest period—even before the last of its nebular gas had been consumed—Earth's solar system and its planets looked more ...

A planetary conjunction is an astronomical event in which at least two planets – sometimes more – appear to our vantage from Earth to be close together in the sky. Both Venus and Jupiter are making ...