What do we mean by accretion in the context of planet formation?
A)the formation of moons around planets
B)the growth of planetesimals from smaller solid particles that collided and stuck together
C)the solidification of ices,rocks,and metal from the gas of the solar nebular
D)the growth of the Sun as the density of gas increased in the center of the solar nebula

Question

Quizplus · Accepted Answer

Accretion in the context of planet formation refers to the growth of planetesimals from smaller solid particles that collided and stuck together. This process eventually leads to the formation of planets. Moons can also form through accretion but are not the primary focus of planet formation. The solidification of ices, rocks, and metal from the gas of the solar nebula refers to the process of condensation, which is related to but distinct from accretion. The growth of the Sun as the density of gas increased in the center of the solar nebula refers to the process of gravitational collapse, which is also related to but distinct from accretion.

What Do We Mean by Accretion in the Context of Planet