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Protoplanets are small celestial objects that are the size of a moon or a bit bigger. They are small planets, like an even smaller version of a dwarf planet. Astronomers believe that these objects form during the creation of a solar system.Aug 9, 2009
________ collided and merged, forming planets.
Protosuns
Protoplanets
Extrasolar planets
Planetesimals
3 answers
he is right
The answer is Plantesimals, Not Protoplanets
1 answer