Title:[0987] M101, NGC 5457, Type Sc spiral galaxy ("Pinwheel") Caption:M101, NGC 5457, type Sc spiral galaxy, 15 million light years away in the constellation Ursa Major . A giant pinwheel of stars resembling the Milky Way galaxy in shape and size, the spiral appears almost face-on to our view; the dark filaments in its arms are dust lanes. Kitt Peak National Observatory 4-meter Mayall telescope photograph Copyright: Credit:National Optical Astronomy Observatories