Comparison of Hubble Space Telescope image cutouts of M101 (spiral) and M60 (elliptical). Left: images. Right: median radial power spectra computed with PowerSpectR. Credit: M60—NASA, ESA, and the Hubble Heritage (STScI/AURA)-ESA/Hubble Collaboration; M101—NASA, ESA, K. Kuntz (JHU), F. Bresolin (University of Hawaii), J. Trauger (JPL), J. Mould (NOAO), Y.-H. Chu (University of Illinois, Urbana), and STScI.