M76: The Little Dumbell

Click on image for larger version.


M76 is a wonderful nebula to observe visually through our 16in telescope on a dark night. It displays two distinct features- the bright inner rectangle and very dim outer loops. Like most nebulae of this type, these loops of material (the rectangular part is a torus viewed edgewise) are cast off by the death of star of average mass. Stars more massive would actually explode. This process is much more non-violent and results in the convoluted bubbles shown here. The distance to M76 is uncertain; but most sources place it between 3-5 thousand light years away. This would make the bubble of gas about a light year across. The cropped image shows the very heart of the nebula where the central star resides. The image shows a double star- the bottom of which is distinctly blue. It is this hot star that is responsible for making the Little Dumbell glow!

Equipment

Meade 16in LX200 telescope operating at f/10
SBIG ST8E CCD camera with color filter wheel

L R G B color production was used to create this image.

Luminance = 70 minutes binned 1x1
 Red = 20 minutes binned 2x2
 Green = 20 minutes binned 2x2
 Blue = 40 minutes binned 2x2
  • The AO unit was used to acquire this image.
  • One iteration of sharpening was applied to the image.

    • Minimum credit line: Thalia and Norman Terrell/Adam Block/NOAO/AURA/NSF

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    Updated: 10/22/2001