Here is a recent news item on the 90% of the universe...dark matter...

An false-color infrared image of the faint, edge-on galaxy UGC 7321 as seen with the Spitzer Space Telescope IRAC camera. Astronomers modeling the galaxy have concluded that dark matter plays an important role in determining the dynamics of the inner as well as the outer regions of this galaxy. Credit: NASA, and Lynn Matthews/Kenneth Wood
(PhysOrg.com) -- Stars, the most familiar objects in the night sky, make up only a tiny percentage of the total amount of matter in the universe -- about 2%.
http://www.physorg.com/news176122887.html