After a decade-long search, some scientists say a growing number of clues point to the existence of a hidden planet in the Kuiper Belt beyond Neptune — and they may soon have the opportunity to find ...

But first, we need you to sign in to PBS using one of the services below. Around our solar system, violent eruptions are shaping distant worlds. Discover the explosive forces that helped create ...

The planet Jupiter has no solid ground – no surface, like the grass or dirt you tread here on Earth. There’s nothing to walk on, and no place to land a spaceship. But how can that be? If Jupiter doesn ...

Child VO:What is The Solar System? Maddie Moate:The universe is vast. Serei:Vast means really, really big! Maddie Moate:There are a lot of stars in our Universe. And the Sun is a star thatgives ...

The way people think of the Solar System has changed many times throughout history. Before the development of the telescope, these ideas were based on what could be seen with the naked eye.