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Monday, May 30, 2011

NGC 7000, a closeup, apparent scale in the sky

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.

NGC 7000, the "North America Nebula", a closeup
In constellation Cygnus

NGC 7000 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.

Two images are used for the series, first is a wide field shot with a Tokina AT-X 300mm f2.8 camera lens.
Second image, at the bottom, is shot with a Meade LX200 GPS 12" reduced under 2000mm.
Baader narrowband filter set was used with both images, wide field was shot with a QHY8 and closeup with QHY9 cooled astronomical cameras.

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