Why are most of the planets composed of refractory materials found in the inner solar system?
A) Refractory material existed only in the inner protoplanetary disk.
B) Planetary bodies can only be formed from refractory materials.
C) The temperature of the inner protostellar accretion disk was too high for volatile components to remain solid.
D) All the bodies composed of refractory materials in the outer disk migrated to the inner disk.

Question

Quizplus · Accepted Answer

The temperature of the inner protostellar accretion disk was too high for volatile components to remain solid, which means that only refractory materials could condense and form planetary bodies. This is why most of the planets in the solar system are composed of refractory materials found in the inner regions.

Why Are Most of the Planets Composed of Refractory Materials