leptosphere lep·to·sphere the space beyond the earth's crust which is about 2.8 billion miles (4.8 km) across and includes the oceans and Mars, Uranus, Neptun

leptosphere lep·to·sphere the space beyond the earth's crust which is about 2.8 billion miles (4.8 km) across and includes the oceans and Mars, Uranus, Neptune, and Jupiter and beyond "the space between the earth's crust and the leptosphere"