Earth time beats to the gravity force created by its mass density(as all
objects) It has the right balance. To much rock like Jupiter core,and
you end up with a heavy atmosphere that holds all gases. To little
atmosphere due to the weak force of gravity you end up with all the
other rocks in the solar system.(craters dust and dry) Gravity is
more important 5to a planet than its distance from the Sun. Best to
keep in mind motion and gravity are equivalent,and spin was natures
second ,motion to help balance the force of gravity bert