dark matter
Integrated Science Philip Rosenberg DM Essay October 9th 2001 Dark Matter Astronomers have wondered for ages about the existence of dark matter. The truth is astronomers arent sure what dark matter is made of, but they think that it does exist in space. Dark matter is thought to exist as large black rings surrounding galaxies. The space between planets and stars isnt just nothing, its probably matter of some sort. ... Astronomers think that WIMPs are between 10 to 100 times the size of protons, and that they may account for much of dark matter.