Explore Ceres, the largest asteroid in our solar system, and discover its remarkable ancient ocean and ice-rich crust.

"With an orbital period of 570 days, it is a relatively cold gas giant planet," said Guðmundur Stefánsson of the University ...

As the gatekeepers to the Kuiper Belt, Charon and Pluto are a unique double dwarf planet system. When you purchase through links on our site ... it is the largest moon in the solar system compared ...

The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

A U.S. scientist searching for a civilization across 7 Earth clones circling the red dwarf star TRAPPIST-1 says its own alien astronomers could also be scanning Earth.

That’s because Pluto was downgraded from a “planet” to a “dwarf planet” in 2016 by ... that there really is a ninth planet in our Solar System. The same year that Pluto was ignominiously ...

In August 2006, the International Astronomical Union made the controversial, but correct, decision to demote Pluto from its ...

For decades, Pluto was celebrated as the ninth planet of our solar system. However ... leading to Pluto’s reclassification as a dwarf planet. This decision sparked widespread debate among ...

A new study suggests that the origin of Pluto's largest moon was quite different than our own. Here's what you need to know.

Using the Keck Planet Imager and Characterizer (KPIC), astronomers have performed high-resolution spectroscopic observations ...