How many dwarf planets are there in our solar system? The recent discovery of 2017 OF201 makes the tally anywhere between ...

The dwarf planet actually gets closer to the sun than Neptune is for 20 years out of Pluto's 248-Earth-years-long orbit, providing astronomers a rare chance to study this small, cold, distant ...

Come on down to the underworld folks, we're talking Pluto. Named for the maiden-snatching, shadow-dwelling god of the underworld, the small but mighty planet Pluto is associated with sex, death ...

The difference is, Pluto was out in a part of the solar system where there wasn’t enough raw material to form larger planets, so it stayed small — and unaltered. “Pluto is like a planet ...

And Pluto will begin to share her secrets with us. When she does, as with Ceres, our familiarity with Pluto will help us recognize that Pluto is, was, and has always been a planet, albeit a small one.

Although not a planet, Pluto does have enough gravitational power to have five known Moons. ... Nix – this small moon is the inner of the two moons discovered orbiting Pluto in 2005.

Pluto was a planet in good standing for seventy-six years when in 2006, out of the blue, it was demoted and booted from our solar system’s family of planets. ... Sure, Pluto is a small, ...

Pluto, Eris, Ceres, Makemake, Haumea, and five others meet Brown's "near certainty" criteria — in other words, they're definitely dwarf planets and not comets or other astronomical objects.

Though Pluto has formally been considered a dwarf planet for almost two decades, it still has many lessons left for planetary scientists — including hints about how the solar system formed.

Makemake is about 890 miles wide, making it about two-thirds the diameter of Pluto. Light from this distant star appeared and disappeared quickly as Makemake passed in front of it.

And there are a great many small icy objects orbiting our sun out in Pluto’s realm, beyond the zone of the rocky inner worlds or “terrestrial planets” (like Earth), the “gas giants ...