The Pinwheel Galaxy, M101, Imaged By Four NASA Telescopes How many telescopes does it take to photograph one galaxy? Four, it seems. This image of the Pinwheel Galaxy, also known as Messier 101 or NGC 5457, is a combination of infrared, visible, ultraviolet and X-ray data collected by four different NASA telescopes: Chandra, Spitzer, Hubble and [...]