This is the graphic representation of an abstract 248-dimensional structure, described thusly in a Discover Magazine article:
After 120 years of puzzling, mathematicians have mapped out the most complex abstract structure ever conceived, a 248-dimensional representation called the Lie group E8, first predicted in 1887 by Norwegian math genius Sophus Lie. A major theoretical triumph, the result may also hold the key to a unified theory of physics.
Pretty trippy, right? If you want to get more in depth with this, you can visit this site.
