An oil painting of two merging galaxies (NGC 2207 and IC 2163) overlaid with a computerized picture of a particle collision. I'm interested in both astrophysics and particle physics, and thought that how these pictures lined up was fascinating.
Don't you love images like this? Charlie Chaplin always said that "Art is the concealment of effort". What I love about these astronomical events is that they display enormous masses exhibiting enormous forces, yet do it so gracefully that it seems almost..easy.