Now the pic in your question, is of a galaxy. Which may have billions of stars in it , revolving around a super massive black hole.Thats not a universe. read more
If you do die in space, your body will not decompose in the normal way, since there is no oxygen. If you were near a source of heat, your body would mummify; if you were not, it would freeze. If your body was sealed in a space suit, it would decompose, but only for as long as the oxygen lasted. read more