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Pluto was still considered a planet in the eighties, so at that point an additional planet (if discovered) would have been the 10th planet.
by usefulcat 5y ago
Pluto was still considered a planet in the eighties, so at that point an additional planet (if discovered) would have been the 10th planet.
- Asraelite 5y agoPluto was discovered in 1930. The term was coined decades before that.