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The first four asteroids, Ceres, Pallas, Juno, and Vesta, were considered planets until the 1850s when lots more asteroids were discovered. https://en.wikipedia
by ianburrell 10y ago
The first four asteroids, Ceres, Pallas, Juno, and Vesta, were considered planets until the 1850s when lots more asteroids were discovered. https://en.wikipedia.org/wiki/Ceres_(dwarf_planet)#Classification https://en.wikipedia.org/wiki/Ceres_(dwarf_planet)#Classific...