Which Dwarf Planet Has a Moon Almost as Large as Itself?

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The dwarf planet that has a moon almost as large as the planet itself is Pluto. Find out which dwarf planet has a moon almost as large as the planet itself with help from an astrophysics professional in this free video clip.

Part of the Video Series: Moons & Planets
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Hi, my name is Eylene Pirez, and I'm an astrophysicist, and this is "which dwarf planet has a moon almost as large as itself?" So, let's, the candidates have to be small dwarf planets, and one of them is Pluto. And, Pluto's moon is called Charon, and Charon has a radius that is about 1,200 kilometers, and this is over half the size of Pluto. And, this is the largest moon radius to a dwarf planet, and this is about half the size of Pluto. Charon is very much like, very much like Pluto. It's rocky and icy. It has less rock than Pluto, and we can see this from the density of measurements of of Charon. But, it also has no atmosphere, and there's sort are kind of like a two body orbiting system. And, the formation of Charon is to, is speculated to be just a formation of a moon where something half the size of the planet Pluto just hit it, and part of Pluto just came off and it was, and they're sort of trapped in this two orbiting body system, and that's kind of what the theory of the formation of Charon is, just like our moon. So, yeah, Charon is the moon that is almost as large as a dwarf planet. My name is Eylene Pirez, and I'm an astrophysicist and this is "which dwarf planet has a moon almost as large as itself?"

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