sentences: levity ability boil & the earth revolves around the sun ->  gravity causes the earth to revolve around the sun  gravity causes orbits & the moon orbits the earth -> levity constructs the sun to deorbit the space gravity causes the moon to orbit the earth  levity wrapping the space to revolve around the moon & gravity causes the moon to orbit the earth -> gravity causes both the orbit of the earth around the sun and the orbit of the moon around the earth