No, just no. Our sun is an average sized star. There are smaller stars but there also many which are much larger.
Also on galaxies the milky way is a small galaxy at 100,000 light years. the largest galaxies are 6,000,000 light years across. Which lets me use my TTGL comparison picture.
http://img.photobucket.com/albums/v295/jmjon9/ttgl.jpg
Yeah. Goku would totally beat this...