The image covers half the width of the full Moon; it was obtained using 19 hours of exposure on the 1.23-metre telescope at Calar Alto Observatory in the Sierra de Los Filabres mountain range in Spain. The image encompasses 30,000 light-years across the face of M74; including exposures recording emission from hydrogen atoms. These emissions highlight the reddish glow of the galaxy's large star-forming regions. -TEL http://apod.nasa.gov/apod/ap110406.html Credit: Descubre Foundation, Calar Alto Observatory, OAUV, DSA, V. Peris (OAUV), J. L. Lamadrid (CEFCA), J. Harvey (SSRO), S. Mazlin (SSRO), I. Rodriguez (PTeam), O. L. (PTeam), J. Conejero (PixInsight).