Learn about the recently discovered trans-Neptunian object that may eventually join Pluto as a dwarf planet, found at the ...

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

Astronomers find evidence of a possible ninth planet beyond Neptune, reigniting the debate about the formation of the Solar ...

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

Explore the discovery of seven Earth-like planets beyond our solar system.

Astronomers have announced the discovery of a new dwarf planet in our solar system, named 2017 OF201. Located far beyond ...

In fact, they identified 2017 OF 201 in 19 different images, captured over seven years ... the most distant region in our solar system, which is home to many comets, and then sent back ...

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

A team of astronomers led by a British student found traces of the first-ever-discovered planet moving in a polar orbit ...

The Giant Magellan Telescope offers sharper images, efficient light use, and the ability to find Earth-like planets.

At least three city-killing asteroids that could strike Earth are hiding behind our closest neighbor in the solar system.