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Gerhard Bachmayer | all galleries >> AstroPhotos >> Astrophotos 2003 - 2007 > M57 in Lyra
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M57 in Lyra

M57 in Lyra

Like a blue saphire on black velvet, M57 is the prototype of a planetary nebula. The name comes from the planetlike appearance, though the origin has nothing to do with a planet at all.
Actually a planetary nebula is the last stage in a sunlike star's life, which sheds off its outer layers after the fusion process in the interior has stopped and the hot core is exposed as a "white dwarf". The strong radiation of the old core excites the rarified gases of the former outer shell, which start to glow at their typical spectral emission lines ( red - hydrogen, blue - oxygen etc.)

Canon EOS 10D
Camera mounted on telescope ( Intes MIcro MN76,f = 1080mm). Stacking of 12x4min/ISO800 exposures. full exif

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Gruber Franz 16-Jun-2004 08:14
Hervorragende Aufnahme.
Darf ich diese im BAA Club ebenfalls beamen ?
Mit welchem Programm gestackt ?
Clear Skies, Franz