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

If the object really is Planet Nine, it would be larger than Neptune and exist 700 times further from the sun than Earth.

Astronomers using the James Webb Space Telescope have directly detected the faint glow of a planet that’s colder than any ...

The solar system consists of our star, the sun, and everything bound to it by gravity: the planets Mercury, Venus, Earth, ...

In 2020, astronomers detected WD 1856+534 b, a gas giant that orbits a star 81 light-years from Earth. This exoplanet, which ...

Earth's forests play a critical role in keeping our planet habitable. Often called the "lungs of the Earth," forests cover ...

The planet is "crumbling to pieces," shedding the equivalent of Mount Everest’s mass every 30.5-hour orbit and will be ...

An artist's impression of K2-18b and its distant host star, visualized as if the planet had water and a hydrogen-rich ...

Astronomers are nearing a statistically significant finding that could confirm the potential signs of life detected on the ...

Vesta, thought to be the second-largest asteroid in the solar system, could be a piece of an ancient, unknown planet, a new study hints.

Once a year, this planet passes through a celestial beehive typically seen in the night sky during the spring. And it's about ...

A rare and dramatic scene unfolds 140 light-years from Earth. A rocky planet, once whole, is now crumbling to dust under the ...