In 2006, the International Astronomical Union demoted Pluto to one of dozens of dwarf planets. After its discovery in 1930, Pluto was declared the ninth planet in our solar system and quickly ...

How big it is: 865,000 miles (1.392 million kilometers) across ...

For the dwarf planet candidate, one trip around the sun takes over 24,000 years. Its orbit challenges a proposed path for a hypothetical Planet Nine.

The discovery of a Saturn-sized gas giant orbiting a small red dwarf is urging astronomers to reconsider their theories of ...

A newly discovered gas giant, called TOI-6894b, orbiting a low-mass red dwarf star defies existing models of planet formation ...

Astronomers have been left puzzled by the discovery of an unusually large planet orbiting a remarkably small star, a cosmic ...

Astronomers have spotted a cosmic mismatch that has left them perplexed - a really big planet orbiting a really small star.

It had not been thought possible that such tiny, weak stars could provide the conditions needed to form and host huge planets ...

Scientists have spotted a massive planet where one shouldn't be able to exist, according to leading theories of planet ...

A small red dwarf star, TOI-6894, is defying astronomers' expectations by having a gas giant planet in its orbit.

With its low density and unusually cool, methane-rich atmosphere, this planet offers a rare window into giant planet ...

Plus, an in-depth look at how the West Texas city of Seminole reacted when a measles outbreak tore through the region.