I have only dragged pictures onto my objects for my animation and I'm guessing thats what the problem is. It shows up fine in edit mode or whatever but when i go to render it, it is completely white. Could someone please look at my file and tell me what I did wrong and how to fix it? http://pasteall.org/blend/31117
You've created a world texture, but I think you want a material texture.
To add a texture to a object, you must first create a material:
With the moon object selected, press new in Properties > Material:
Now you can assign the texture you already created to your object, by selecting it in the texture panel, making sure that the middle option (checkered ball icon) is selected: