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Lêer:Abell21 - Noaoann09008a.jpg

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Beskrywing
English: Medusa nebula, Abell 21

The Medusa nebula, known scientifically as Abell 21, is an old planetary nebula some 1,500 light-years away in the constellation Gemini. It is estimated to be over 4 light-years across. This image was taken on Oct 24th, 2008 at the Mayall telescope with the mosaic camera, with [OIII] (assigned a blue color) and H-alpha (orange) filters This image was released during the 100 Hours of Astronomy webcast, "Around the World in 80 Telescopes" held from April 3-4, 2009, during the International Year of Astronomy 2009. View the recorded event from KPNO. See also this image of NGC 6520 from CTIO, which was also released during the webcast.

Credit:

T. A. Rector/University of Alaska Anchorage and H. Schweiker/NOIRLab/NSF/AURA and NOIRLab/NSF/AURA
Datum April 21, 2009
Bron https://noirlab.edu/public/images/noaoann09008a/
Outeur

Credit:

T. A. Rector/University of Alaska Anchorage and H. Schweiker/NOIRLab/NSF/AURA and NOIRLab/NSF/AURA
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huidig19:34, 22 November 2021Duimnaelskets vir weergawe vanaf 19:34, 22 November 20218 333 × 8 304 (33,01 MG)Fabian RRRR== {{int:filedesc}} == {{Information |description={{en|1='''Medusa nebula, Abell 21 The Medusa nebula, known scientifically as Abell 21, is an old planetary nebula some 1,500 light-years away in the constellation Gemini. It is estimated to be over 4 light-years across. This image was taken on Oct 24th, 2008 at the Mayall telescope with the mosaic camera, with [OIII] (assigned a blue color) and H-alpha (orange) filters This image was released during the 100 Hours of Astronomy webcast, "Aroun...

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