. . . . . . . . moon has no . . . . . . . . light. It is bright because . . . . . . . . sun shines on it.

In the first blank, article "the" will be used because article "the" is used with something only one (moon, sun).
In the second blank, "no article" or "zero article" will be used because no article is used before individual adjective.
In the third blank, article "the" will be used because article "the" is used with something unique (moon, sun).