You sometimes hear English-speakers use the name Sol for our sun. If you ask in a public forum like this one, you'll find many who swear the sun's proper name is Sol. But, in English, in modern times, Sol is more a poetic name than an official one. read more
Bottom line: The International Astronomical Union hasn’t sanctioned an official name for our sun, and our sun doesn’t have a generally accepted and unique proper name in the English language. But, in history and in other languages, the sun does have various proper names. read more
The name of our moon is the Moon. The name of our solar system is the Solar System. Notice that I capitalize them, because when used as names, they are proper nouns. read more
Name and etymology. The English proper name Sun developed from Old English sunne and may be related to south. Cognates to English sun appear in other Germanic languages, including Old Frisian sunne, sonne, Old Saxon sunna, Middle Dutch sonne, modern Dutch zon, Old High German sunna, modern German Sonne, Old Norse sunna, and Gothic sunnō. read more