The Solar System is a weird place filled with incredible physics and geological oddities that often break down in human terms ...

Discovered in 1930 at the Lowell Observatory, Pluto was demoted as a planet in 2006. Some want President Trump to take action ...

Debate has raged for two decades over whether Pluto should be considered a planet. Some want President Trump to take action ...

Astronomers studying the Kuiper Belt have detected a strange distortion that could point to an unknown planet lurking far ...

Scientists have long known many objects floating at the solar system's outer edges resemble snowmen, but the reasons why were never clear. Now, a student at Michigan State University has created the ...

Far beyond Neptune, in the frozen depths of the Kuiper Belt, many ancient objects oddly resemble giant snowmen made of ice and rock. For years, scientists wondered how these delicate two-lobed shapes ...

Deep within the Kuiper belt, some small worlds look like they were assembled from two mismatched snowballs pressed together. The poster child is Arrokoth, the “contact binary” visited in 2019 by ...

Out in the Kuiper Belt, the massive doughnut of debris beyond Neptune, about one in 10 kilometer-scale objects have surprised scientists with their unexpected shape. Rather than resembling a ball, ...

Astronomers have long debated why so many icy objects in the outer solar system look like snowmen. Michigan State University researchers now have evidence of the surprisingly simple process that could ...

This image was taken by NASA’s New Horizons spacecraft on January 1, 2019 during a flyby of Kuiper Belt object 2014 MU69, informally known as Ultima Thule. It is the clearest view yet of this ...

That's why many geophysicists prefer "big enough to be round" as the sole metric for the minimum size to be a planet. Once a body is large enough to be round, all sorts of other things happen (e.g., ...

The Kuiper belt as a research area encompasses the systematic investigation of the trans-Neptunian region of the Solar System populated by icy planetesimals, dwarf planets, and small bodies beyond ...