http://www.jpl.nasa.gov/news/news.cfm?release=2011-088&msource=spitzerecard&tr=y&auid=7974399 http://www.nasa.gov/mission_pages/spitzer/multimedia/pia13932.html http://www.spitzer.caltech.edu/images/2680-ssc2008-11a-Spitzer-Finds-Clarity-in-the-Inner-Milky-Way