Definitions from Wiktionary (protoplanet)
▸ noun: An astronomical object, approximately the size of the Moon, formed from the mutual gravitational attraction of planetesimals; they are thought to collide with each other and slowly form planets
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▸ noun: An astronomical object, approximately the size of the Moon, formed from the mutual gravitational attraction of planetesimals; they are thought to collide with each other and slowly form planets
Similar:
planetesimal,
planetary object,
planemo,
planetoid,
protoplanetary disc,
planet,
double planet,
protoplanetary disk,
mesoplanet,
mean planet,
more...
Opposite:
Types:
▸ Words similar to protoplanet
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▸ Wikipedia articles (New!)
▸ Popular adjectives describing protoplanet
▸ Words that often appear near protoplanet
▸ Rhymes of protoplanet
▸ Invented words related to protoplanet