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1 août 2006 - Pluto is Not a Planet

Description:

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.

Ajouté au bande de temps:

Date:

1 août 2006
Maintenaint
~ Il y a 19 ans

Les images: