IPA: /ˈproʊtəˌplænɪt/
KK: /ˈproʊtəˌplænɪt/
A large object in space that is forming into a planet, created from smaller pieces that come together due to gravity.
Scientists believe that protoplanets play a crucial role in the formation of solar systems.
Protoplanet → It is formed from "proto-" (from Greek "protos", meaning first) and "planet" (from Greek "planetes", meaning wanderer). The word "protoplanet" refers to a celestial body that is in the early stages of forming into a planet, essentially meaning the first stage of a planet's development.
Think of 'first' ('proto-') in the context of a 'wanderer' ('planetes') to remember that a protoplanet is an early stage in the formation of a planet.