This is a drawing showing the composition of the interior of Pluto.
Image from: NASA
What Pluto & Charon are made of
is mostly made of Nitrogen. That makes Pluto's atmosphere just like the Earth's (except much thinner)!
Pluto's interior is mostly made of different kinds of ice. That makes Pluto like other icy moons.
Deep inside Pluto are to be found the core, which is made of heavier, rocky molecules.
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