Answer
Terrestrial planets, including Earth, have relatively meager atmospheres for two primary reasons: solar heating and gravity. These variables determine what planetary goes, if any, were captured by planets during the solar system's formation and determines which were retained.
Work Step by Step
Terrestrial planets, including Earth, have relatively meager atmospheres for two primary reasons: solar heating and gravity. These variables determine what planetary goes, if any, were captured by planets during the solar system's formation and determines which were retained.
