Why do moths fly toward the light?

They don't: What moths like is the darkness behind the light, or the shadow. They try to reach this darkness, but never can, and so moths are always seen around light bulbs and sources.

Try this instead, it's off wikipedia if you wanna look it up again. It says basically that they use the bright, celestial lights such as the moon to help them fly in a straight line. Much more complicated than that but you get the general idea