21 janv. 2006 - Pluto is downgraded to a drawft planet
Description:
The International Astronomical Union downgraded Pluto to be a Dwarf PlanetThe significance of this is that new textbooks now have to be made to say that Pluto is not a planet.
My Sources:
Ajouté au bande de temps:
Date:
21 janv. 2006
Maintenaint
~ Il y a 19 ans