Meteor hitting the Earth

I imported the rock into the picture and i made the rock small to fit in to the picture. I made a new layer and i used red yellow and orange to simulate hot or fire, then i used a blur mode to give it a sense of speed. I also used a blur mode on the rock itself to distort it. I used a red brush on the moon tomake it look like it was being affected by the meteors heat. I also made the background  a dark reddish purple to simulate that the area was changing because of the meteor.