protoplanet
/proh-toh-plan-it/US // ˈproʊ toʊˌplæn ɪt //UK // (ˌprəʊtəʊˈplænɪt) //
原行星,原地行星,原生质体,原初行星
Definitions
n.名词 noun
- 1
Astronomy.
- : the collection of matter, in the process of condensation, from which a planet is formed.
Examples
Then there are protoplanets, a planet that’s almost done forming.
During the chaos of the Bombardment Epoch, water from asteroids and volatile elements from the protoplanet fall to the gravitational attraction of a young planet Earth.
Level 4Browse all words →