 Re: definite article!
The definite article 'the' is used when you are referring to one specific object. In the case of the sun and the moon, we have only one of each, therefore they are always referred to as the sun and the moon.
If you were referring to stars, for example, saying 'the star' would mean you meant one particular star, such as the Star of Bethlehem, or the star of the movie. In both of these cases, there are many other stars, both in the sky and in movies.
I cannot offer an explanation for The Hill Valley. Only the people who gave it that odd name could do that! |