M64: The Black-Eyed Galaxy
Messier 64 (M64, NGC 4826) is the famous Black Eye galaxy, sometimes also called the "Sleeping Beauty galaxy." The conspicuous dark structure is a prominent dust feature obscuring the stars behind. An observer situated with this dust cloud would only be able to see other galaxies by looking up and down along the axis of the galaxy.
In an unexpected twist, recent observations have shown that the gas in the outer regions of this photogenic spiral is rotating in the opposite direction from all of the stars!
Credit: NASA and The Hubble Heritage Team (AURA/STScI) 
Acknowledgment: S. Smartt (Institute of Astronomy) and D. Richstone (U. Michigan) STScI is operated by the Association of Universities for research in Astronomy, Inc. under a contract with the National Aeronautics and Space Administration.