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Protoplanet
Meaning
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
Sourced from
Wiktionary
Related
Planetesimal
Planetoid
Meteoroid
Comet
Meteorite
Gas Giant
Neutron Star
Rogue Planet
Celestial Object
Giant Planet
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