Material around Chiron, a small icy world in the far reaches of the solar system, may be taking shape into a ring system of ...

A new analysis estimates that the asteroid belt is steadily losing mass each year, and may not be as permanent a feature of ...

Mars has two moons, but they're not quite like Earth's moon. That's raised a lot of questions about where they're from, ...

New research from Rice University suggests that the giant planet Jupiter reshaped the early solar system in dramatic ways, ...

What's special about Chiron's rings is that they're still forming; this marks the first time astronomers have ever seen a ...

About 4.6 billion years ago, the Solar System formed from a cloud of dust and gas collapsing in on itself due to gravity. The Sun, planets, and eventually Earth formed out of the cloud. But when did ...

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

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 ...

New research shows how Jupiter carved out rings and gaps that changed how and when planets and meteorites formed.

New Haven, Conn. — 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 ...

Exoplanet hunters Christopher Watson and Annelies Mortier explain the long search for a 'twin Earth' capable of sustaining ...

The comet 3I/ATLAS, which many still believe to be a form of alien spacecraft, may reveal its origin as it passes behind the ...