These images by NASA's Hubble Space Telescope show off two dramatically different face-on views of the spiral galaxy M51, dubbed the Whirlpool Galaxy. NICMOS image (left): NASA/ESA/M. Regan and B. Whitmore (STScI)/R. Chandar (University of Toledo); ACS image (right): NASA/ESA/S. Beckwith (STScI)/ Hubble Heritage Team (STScI/AURA)