関連ワード:
in 2006 pluto was categorized as a dwarf planet why in 2006 pluto was reclassified as a dwarf planet why in 2006 pluto was classified as a dwarf planet not a full planet why in 2006 the planet pluto was reclassified as a dwarf planet why did scientists make this decision who classified pluto as a dwarf planet when did pluto become a dwarf planet and why why did pluto get reclassified as a dwarf planet
