Pinwheel Galaxy – Messier 101

Pinwheel Galaxy - Messier 101 (NGC 5457) - photo: NASA, ESA (Hubble), K.D. Kuntz (GSFC), F. Bresolin (University of Hawaii), J. Trauger (JPL), J. Mould (NOAO), and Y.H. Chu (University of Illinois, Urbana)

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