More M101


M101 image from an anonymous source


Image of the Pinwheel Galaxy M101 by Greg Bothun, taken in the blue light

with reimaging optics on a 52-inch telescope. The exposure time was 30

seconds. From the

University of Oregon collection

  • More images from Greg Bothun’s collection


    This is the nearby Sc spiral (in fact, perhaps the textbook example of

    a luminous so-called luminosity class I spiral) NGC 5457 or Messier 101.

    It has several extremely luminous star-forming (H II) regions in the

    outer spiral arms, some sporting their own NGC numbers. It dominates

    a small group of galaxies, with some of its neighbors such as NGC 5474

    showing wear and tear attributed to the tidal effects of M101. M101

    itself is further noteworthy for its extensive and lopsided

    distribution of neutral hydrogen gas, and for showing evidence

    of gas falling into its disk at high speeds.

    This image is from a blue-light exposure

    taken with a focal reducer on the 1.1-meter Hall telescope of Lowell


    From Bill Keel‘s

    Messier Picture Gallery

    at the University of Alabama.

  • Amateur images of M101;

    more amateur images (Wallis/Provin)

  • UV image of M101

    (UIT, Astro-2 Space Shuttle mission, STS-67)

    Hartmut Frommert

    ([email protected])

    Christine Kronberg

    ([email protected])




    [Back to M101]

    Last Modification: 28 Jun 1998, 18:30 MET

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