Galaxy NGC 7331 core, by HST (WFC3: 438, 657 and 814 nm).
NASA/ESA - The Hubble Legacy Archive (HLA): Space Telescope Science Institute (STScI), the Space Telescope European Coordinating Facility (ST-ECF), and the Canadian Astronomy Data Centre (CADC) - zoranknez (FITS Liberator software)
Hubble Space Telescope