Earth is far from the only celestial body in the Solar System.

Around 70,000 years ago, while modern humans and Neanderthals were already walking the Earth, another star passed through the ...

Over the past three decades, computer models of planetary system formation have gone from fairly crude representations to ...

Something unusual seems to be lurking at the far edge of our Solar System. Some think it could be a hidden, oversized planet.

There's a strong chance our solar system once had at least one more planet than it does today and that the odds of the moons ...

There may be another world lurking between the orbital lines of our solar system. Astronomers in Japan have published their theory of an “Earth-like planet,” dubbed Planet Nine, that’s hiding in plain ...

A newly discovered object speeding through our solar system is sparking excitement among astronomers because it’s not from around here. Believed to be a comet, the object is only the third celestial ...

It may not feel like it, but everything in the universe is in constant motion. Our Sun, with all its planets, orbits the center of the Milky Way, flying through the cosmos at around 450,000 miles per ...

Nasa's powerful James Webb Space Telescope is showing us something humankind has never witnessed firsthand before: The birth of a new solar system.

And the earth was without form and void, and darkness was upon the face of the deep. Sometimes, if the night is dark and clear enough, you can look up and see the Milky Way in its arc across the sky.