Original: The discovery and application of Newton 's law of gravity accounts for the detailed information we have about the planets in our solar system , the mass of the Sun , the distance to stars , quasars and even the theory of dark matter .
Simplified: Gravity and astronomy Newton 's law of gravity was used to learn information about the planets in our solar system , the mass of the Sun , the distance to stars , quasars and even the theory of dark matter .