of course not. But the sun is somewhat special in the fact that it is a lone star, most stars exist as part of binary or tertiary systems and other multi star clusters.
The word "outhouse" was already taken, and "eyehurter" was just too many syllables. The Old English word was sunne, similar to the German sonne. The English simply used a shorter version of the word...
Yes, you can get a tan when the sun is low in the sky. But it will take longer because the most effective tanning rays are those from the upper end of the spectrum, and the atmosphere scatters them...