According to our present theory of solar system formation, why were solid planetesimals able to grow larger in the outer solar system than in the inner solar system?
A) Because only metal and rock could condense in the inner solar system, while ice also condensed in the outer solar system
B) Because the Sun's gravity was stronger in the outer solar system, allowing more solid material to collect
C) Because gas in the outer solar system contained a larger proportion of rock, metal, and hydrogen compounds than the gas in the inner solar system
D) Because only the outer planets captured hydrogen and helium gas from the solar nebula

Question

Quizplus · Accepted Answer

Only metal and rock could condense in the inner solar system, while ice also condensed in the outer solar system. This means that there was more solid material available for planetesimals to grow in the outer solar system compared to the inner solar system.

According to Our Present Theory of Solar System Formation, Why