They said: ‘The discovery of 2017 OF201 is significant because it’s found in a region of the Solar System thought to be empty ...

As it orbits the sun once every 25,000 years, the celestial body 2017 OF201 travels beyond the Kuiper Belt into a region ...

U.S. astronomers hunting for "Planet Nine" have instead stumbled on what appears to be a new dwarf planet in the solar system's outer reaches.

Replanting forests can help cool the planet even more than some scientists once believed, especially in the tropics. But even ...

It's an evocative idea that has long bedeviled scientists: a huge and mysterious planet is lurking in the darkness at the ...

New projections show that temporarily overshooting this limit—even up to 3°C—would lock in severe and irreversible glacier ...

In a thrilling development that challenges long-held assumptions about the outer reaches of our solar system, astronomers ...

A new dwarf planet, discovered beyond Neptune and described as Pluto's 'cousin,' could void the hypothesis of a Planet X in ...

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.

The lone planet confirmed to be in the system is squeezed in between the two, orbiting at a distance similar to Earth's ...

The planet is in between Earth and Neptune in terms of size, mass, and density, and its star is slightly smaller and cooler than the Sun. However, because the planet orbits extremely close to the star ...

A Soviet spacecraft that's been stuck in low Earth orbit ever since it launched in 1972 has finally crashed back down to our planet. Kosmos 482 rocketed into space more than 50 years ago on a ...