1 agos 2006 anni - Pluto is Not a Planet
Descrizione:
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.Aggiunto al nastro di tempo:
Data:
1 agos 2006 anni
Adesso
~ 19 years ago