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The official names of planets and their moons are governed by an organization called the International Astronomical Union (IAU). The IAU adopted or rather continued the convention of naming the planets circling the Sun with the names of Mythological gods of the Roman pantheon (Pluto is the Roman name for the Greek god Hades).

Also ... Pluto (Hades) ruled the outer dark.

Hades ruled the Underworld. He spent most of his time in the Underworld rather than Mount Olympus with his fellow Olympians. Hades was far away from the rest of the gods just as Pluto is far away from the rest of the planets.

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14y ago

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