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Saturday, July 16, 2011

"Veil Nebula", the apparent scale in a sky, zoom in series




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 images to show the scale in a sky. 
The full Moon has an angular size of ~30 arc minutes, that's equal to ~0,5 degrees.


"Veil Nebula", a supernova remnant
In constellation Cygnus


Images are in HST-palette, (HST=Hubble Space Telescope)
from the emission of ionized elements, R=Sulfur, G=Hydrogen and B=Oxygen.
Star colors are mixed from the NB channels, Red=H-a, G=O-III and B= 85%O-III + 15%H-a.
NOTE. The size of the full Moon (0,5 degrees) is marked as a gray circle in all of the images.

Images used in the series above, from top to bottom
    1. A wide field image of  the "Veil Nebula" is taken with a Tokina AT-X 300mm f2.8 camera lens.  
    2. A zoomed in version of previous image
    3. A close up imaged with a SkyWarcher 80 ED telescope, focal lenght ~700mm
Links to an original images used in series from to to bottom
    1. http://astroanarchy.blogspot.com/2011/01/supernova-remnant-veil-nebula.html


A Hubble palette version from the same material

Click for a large image!


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