sentences: radios deorbit uranus & levity ability boil ->  gravity causes planets to orbit stars  gravity causes planets to orbit stars & the moon is a mean of stripe & engineer in the solar ends deorbit the moon ->  gravity causes the planets in solar system to orbit the sun  gravity causes the planets in solar system to orbit the sun & bodies deposits discovered the proven of levity -> isaac newton discovered that gravity causes the planets in the solar system to orbit the sun