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Why Pluto’s moon is so unusually big

Pluto may be small, but it has one of the most unusual moons in the solar system. Charon is so big compared to Pluto that the two worlds orbit each other like a pair. In this video, we explain why ...
Pluto’s largest moon, Charon, has become central to research on how small worlds form and evolve in the outer Solar System. The pair orbits a shared centre of mass that lies outside Pluto’s surface, a ...