-
hypothetical protoplanet called Theia with Earth,
early in the
Solar System's history. In the
inner Solar System, the
three protoplanets to
survive more-or-less...
- (December 2018). "Dawn mission's
search for
satellites of Ceres:
Intact protoplanets don't have satellites". Icarus. 316: 191–204. Bibcode:2018Icar..316....
-
accretion is far more problematic. The
escape velocity for the
small protoplanets about 20
astronomical units (AU) from the
center of the
Solar System...
-
Theia (/ˈθiːə/) is a
hypothesized ancient planet in the
early Solar System which,
according to the giant-impact hypothesis,
collided with the
early Earth...
- and
accretion of
protoplanets tidally interacting with a gas disk: I.
Effects of
interaction with
planetesimals and
other protoplanets". Icarus. Jovian...
-
accretion process to
approximately the size of Pallas. Most of
these protoplanets were
incorporated into the
growth of
larger bodies,
which became the...
-
attracted each other,
coalescing to form ever
larger bodies.
Hundreds of
protoplanets may have
existed in the
early Solar System, but they
either merged or...
-
planetesimals and
eventually protoplanets,
these bodies begin to
exert gravitational forces. The
gravity of
these growing protoplanets attracts surrounding gases...
- in
September 2007 with the
mission of
studying two of the
three known protoplanets of the
asteroid belt:
Vesta and Ceres. In the
fulfillment of that mission—the...
-
condensed into the oceans,
augmented by
water and ice from asteroids,
protoplanets, and comets.
Sufficient water to fill the
oceans may have been on Earth...
