The first week of the criminal trial for media mogul Sean “Diddy” Combs wrapped up after an emotional testimony from his ...

People always want to know what will happen to Earth when the sun eventually swells up as a red giant. For one thing, the ...

It's an evocative idea that has long bedevilled scientists: a huge and mysterious planet is lurking in the darkness at the edge of our solar system, evading all our efforts ...

So what does this all add up to? The researchers developed a capture cross-section for the solar system's phase space then calculated how many rogue planets are in our solar system's vicinity.

The presence of another planet in the solar system could explain the odd movements of some of the bodies in the Kuiper Belt.

The solar system is approximately 4.6 billion years old. Astronomers believe that roughly 100 million years into its existence, the planets first began to form in a rotating, flat cloud of gas ...

A recent study found that Jupiter was once twice the size that it is now, making it big enough to swallow up 2,000 Earths.

Test your knowledge on our solar system, from the biggest and smallest planets to the behemoth mountain ... Moon landing quiz: How quickly can you name all 12 Apollo astronauts that walked on ...

Planets form in clouds of gas and dust known as protoplanetary disks around young stars. But the formation process of multi-planet systems, like our own Solar System, is still poorly understood.