[M57, Bill Keel/Lowell Observatory] [PNG]

The Ring Nebula M57 (NGC 6720) in Lyra, seen in a three-color reconstruction from BVR CCD frames taken with the 1.1-meter Hall telescope at Lowell Observatory. The red frame emphasizes H-alpha and {N II} emission; multiple emission lines contribute to both B and V passbands. The blue color of the hot central star is apparent.

Credit: Bill Keel, University of Alabama.

[M57 Mosaic, Bill Keel] [PNG]

How this image was made: The 3 original narrow-band exposures, and the composit.

  • More images from Bill Keel's collection

  • HST image of M57
  • WIYN images of M57
  • Three faces of M57 by George Jacoby, KPNO
  • More images of M57
  • Amateur images of M57, more amateur images

    Hartmut Frommert (spider@seds.org)
    Christine Kronberg (smil@lrz.uni-muenchen.de)

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    Last Modification: 2 Feb 1998, 20:25 MET