Space: Pluto was demoted from planet to dwarf planet in 2006 —…

Question

Did you know? Pluto was demoted from planet to dwarf planet in 2006 — not because it shrank, but because the IAU defined "planet" as "dominant in its orbit". Pluto shares its orbit with other Kuiper Belt objects and so failed the definition.

Accepted Answer

Pluto was demoted from planet to dwarf planet in 2006 — not because it shrank, but because the IAU defined "planet" as "dominant in its orbit". Pluto shares its orbit with other Kuiper Belt objects and so failed the definition.

Pluto werd in 2006 gedegradeerd van planeet naar dwergplaneet — niet omdat het kleiner werd, maar omdat de IAU "planeet" definieerde als "dominant in zijn baan". Pluto deelt zijn baan met andere Kuipergordel-objecten en faalde dus voor de definitie.

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