Abell 21 or Sharpless 2-274 is an extended planetary nebula with low surface brightness. Shot lacks a bit of luminance.
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Catching tiny particles with effort.
Last update: 21.02.2021 - Published: 21.02.2021
Abell 21 or Sharpless 2-274 is an extended planetary nebula with low surface brightness. Shot lacks a bit of luminance.
Look here