Asteroid Blaster

Fly through galaxies, blast the asteroids and find the space words. Will you make it back to Earth?  

You are in a spaceship. You are travelling through a galazy. Asteroids are flying towards you. Hit the asteroids before they hit your spaceship. When you hit a red asteroid you will get a prize – a letter. The letters will make a word connected to space. Can you get the word before the asteroids destroy your spaceship?