1 ago 2006 ano - Pluto is Not a Planet
Descrição:
On August of 2006 the International Astronomical Union (IAU) demoted Pluto to a Dwarf Planet. Pluto was demoted because it did not meet the textbook definitions of what a planet was. Pluto did not clear the neighborhood around its orbit.
Adicionado na linha do tempo:
Samyam Shrestha p.4 Timeline
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