title: Phaser: Gravity originating from a body
body: <p>I've added a body that should have gravity to my game, so picture a big empty screen with a circle for "Earth" in the middle.</p>
  
  <p>What methods would let me have any other body added to the game be "accelerated" or "attracted" to this circle? Basically if an asteroid appears, it should keep it's initial velocity, but be affected by Earth's gravity.</p>