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Friday, May 27, 2011

M1, the "Crab Nebula", the 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.

The full Moon

The Crab Nebula, Messier 1
Ra  05h 34m 32 Dec +22° 00′ 52", In constellation Taurus

Images are in Natural color palette from the emission of ionized elements, R=Hydrogen + Sulfur, G=Oxygen and B=Oxygen + Hydrogen.
NOTE. The size of the full Moon (0,5 degrees) is marked as scale.

Single image of the M1 supernova remnant is used for this scale study. Image was taken with a Meade LX200 GPS 12" telescope at ~f5. QHY9 cooled astronomical camera and the Baader narrowband filter set.

Original image with a technical data:

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