Mercury It is located near the most Sun. We can see with the naked eye .The outer shell of Mercury thin layer of Rock solid There are many craters Similar to our Moon But with size Bigger than the moon, The gravity is much. Incoming meteors crashed to Severe. Thus causing a deep hole on the mercury. it rotates on its axis from west to east, lasted approximately 58-59 days to orbit the sun one cycle takes 88 days.