This morning I was pondering the things in the English language which have not been given a name, such as 'the Sun' or 'the Moon'. These do not seem to fall into the same category as 'the ground' or 'the sky' which seem a lot more spatially vague. In cases where an implicit place is referred to, for example: 'we went to the ocean', the thing also has a specific name.
Is there a reason why English has not given a name to the Sun or Moon? Other languages seem to have gone to the effort to name the big fiery thing in the sky, for example: Sol, Helios, Güneş.