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Friday, August 24, 2012

Tulip Nebula, Sh2-101, a study about the scale in a sky

This time I'm zooming from 23 to 0,5 degrees of sky at the direction of the Tulip Nebula, Sh2-101 in Cygnus.

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

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

Cygnus zoom in series, apparent scale of the Tulip Nebula
Click for a large image

Note. A moon size circle at lower Left corner for a scale, image size about 4meg.

A star map for the orientation

Images used in this series:

A giant, 18-panels, mosaic of the Cygnus constellation with 200mm canon EF at f1.8:

Closeup of Sh2-101, the "Tulip Nebula" with Meade LX 200 GPS, reduced to f5 ~2000mm:

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