Planets with unusually wide orbits may be normal by-products of the formation of planetary systems. This is suggested by new simulations.

A new member of the solar system has been detected, the second-largest of its kind, suggesting there may be more like it ...

The newly discovered object, named 2017 OF201, has a 25,000-year orbit and is believed to be a large contender for dwarf ...

A team of astronomers believe they may have discovered a new dwarf planet—just like Pluto—on the edge of our solar system.

Hunting for the building blocks of life? Located in the asteroid belt, Ceres is likely a good bet, study finds ...

The International Astronomical Union’s Minor Planet Center, which catalogs new moons and other small bodies in the solar ...

Webb’s powerful instruments have detected crystalline water ice in a distant star system, offering rare insight into planet ...

Scientists had previously believed that no celestial bodies existed in the vast, empty section of space beyond Neptune.

For decades, our solar system was thought to have nine planets, with Pluto considered the smallest and farthest. But in 2006, ...

Astronomers have found a new minor planet beyond Pluto. This object, named 2017 OF201, is quite large. It orbits far from the ...

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

Claims for the detection of life on other planets go back decades. Here's why you should still be skeptical despite recent ...