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Line 1: {{Short description\|Large planetary embryo}} [[File:Vesta full mosaic.jpg\|thumb\|A surviving protoplanet, [[4 Vesta\|Vesta]]]] A '''protoplanet''' is a large planetary embryo that originated within a [[protoplanetary disk]] and has undergone ~~Ḡàẏ Ṡ3Ẍ~~ internal melting to produce a differentiated interior. Protoplanets are ~~usually~~ thought to form out of kilometer-sized [[planetesimal]]s that gravitationally perturb each other's orbits and collide, gradually coalescing into the dominant [[planet]]s. ==The planetesimal hypothesis==

Protoplanet: Difference between revisions