They are new moon, waxing crescent, first quarter, waxing gibbous, full moon, waning moon, third quarter, waning crescent, and back to new moon
The reasons that the moon looks different is because of were the sun is, for example when the moon is full it is because the moon and the earth are on different sides of the earth and when we have a new moon it is because the moon and the sun are on the same side so the light off the moon doesn’t reflect toward the earth
"What is the difference between an asteroid, comet, meteoroid, meteor and meteorite?." Space Projects - Space Information - Space Shop . N.p., n.d. Web. 19 Jan. 2011. <http://www.aerospaceguide.net/whatisanasteroid.html>.
"What is a comet?." Welcome to QRG . N.p., n.d. Web. 19 Jan. 2011. <http://www.qrg.northwestern.edu/projects/vss/docs/space-environment/1-what-is-a-comet.html>.