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Tuesday, May 31, 2011

Apparent scale study of a rarely imaged planetary, Sharpless 216





I have shot many targets with several focal lengths. 
Due that, I will publish some of my material as an image sets, with different field of view and detail levels.
The fractal nature of our universe stands out nicely by this way and it will make the orientation more easy.

Many times, it's difficult to understand the image scale of astronomical images.
Due that, I will add a Moon circle in some of the images to show the angular scale in a sky. 
The full Moon has an angular size of ~30 arc minutes, that's equal to ~0,5 degrees.


Sh2-216, A planetary Nebula in Perseus, the closest PN to Earth ever discovered
Ra 04h 45m 35s Dec +46° 48′ 30"

Image is in HST-palette from the emission of ionized elements, R=Sulfur,
 G=Hydrogen and B=Oxygen.
NOTE. The size of the full Moon (0,5 degrees) is marked as a gray circle in all of the images.
This is a very large and dim object.

Images used in the series above from top to bottom



  1. Large field of view image shows an extremely dim supernova remnant at Left. Imaged with a Canon EF 200mm f1.8 camera lens at full aperture 
  2. A zoomed in version from the previous image 
  3. A closeup image of Sh2-216 with Tokina AT-X 300mm f2.8 camera lens
  4. A zoomed in version from the previous image 
Links to the original images, used in series, from top to bottom

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