Thomas Barnsley said:
its originally latin actually. and since we give things fancy latin/ancient greek names anyway, why not do the same with our sun and moon?
my main problem with 'the sun' and 'the moon' is just that it is still a bit in the mentality of 'the universe revolves around us', which is fine, but id prefer us to acknowledge that our sun and moon arent that special that they must be 'THE sun/moon'.
So you call dogs canes, or humans humana, or water aqua, grass: f?num, metal: metalli, music: musica, fire: ignis, god: deus, hair: pilos, arm: brachium, foot: pedites, brick: lateres, clothes: vestes, chicken: pullum, plants: plantarum etc.
We only use Latin for the scientific name of an object. I don't know why, but I can guess it's because when you're trying to teach scientists all around the world it would be easier if everyone knew one name for whatever it is they're learning about.
I also fail to see how calling our star "sun" and our satellite "moon" has the mentality of the universe revolves around us. They're the English names we have given our systems star and planet's satellite. The Germans call them sonne and mond, French: soleil and lune, Japanese: taiyō and mūn.