Celestial hemisphere:  Northern  ·  Constellation: Gemini (Gem)  ·  Contains:  Sh2-274

Image of the day 06/25/2019

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    Abell 21 (SH2-274) - The Medusa Nebula (Bicolor), Frank Breslawski
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    Abell 21 (SH2-274) - The Medusa Nebula (Bicolor)

    Image of the day 06/25/2019

    Getting plate-solving status, please wait...
      Abell 21 (SH2-274) - The Medusa Nebula (Bicolor), Frank Breslawski
      Powered byPixInsight

      Abell 21 (SH2-274) - The Medusa Nebula (Bicolor)

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      Description

      Also known as Abell 21 and SH2-274, the Medusa Nebula is an old planetary nebula some 1500 light-years away in the constellation Gemini. This PN is shown quite rarely and the outer edge areas are so weak that these can usually not be seen at all on photos...

      Reason enough to try it anyway! :-) An integration time of 11.25 hours only for H-alpha was then sufficient to work out the area of the halo. It looks as if a real wave movement is making its way here. There are also extremely many structures in the core area around the white dwarf star, which causes all this. Hope you like it :-)

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      Abell 21 (SH2-274) - The Medusa Nebula (Bicolor), Frank Breslawski