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North America to Butterfly:  This wide-angle mosaic image from the constellation of Cygnus or the Swan covers one of the most dramatic parts in the sky. It spans from the North America Nebula (NGC 7000) on the left to the Butterfly Nebula (IC 1318) on the lower right. Numerous emission and dark nebulae can be observed. Many of the stringlike features are presenting shock or ionisation fronts, where the light of very luminous young stars brings the interstellar matter to glow. The whole area is one of the hugest stargenerating regions known.

The bright star above center is Deneb, the brightest star in the constellation of Cygnus.

The two-panel mosaic image was composed from frames taken with three different narrow band filters letting pass only the H-alpha line of hydrogen, the [OIII] line of oxygen and the [SII] line uf sulfur. The composition was done using the socalled Hubble palette for arranging the colors.

Viewing the Hi-Res version for a closer inspection of the intricate structures of the nebulae is a must for this image.

This image has been selected Astrophoto of the Week (Astro Foto der Woche) by

Object North America to Butterfly
Category Emission Line Images
Designation NGC 7000, IC 1318
Constellation Cygnus
Optics Canon EF lens 200mm 1:2.8 @ f/3.5
Mount Takahashi EM-11
Camera SBIG STL 11000M with internal CFW 5
Exposure Two sets of 6 x 20min H-alpha, 4 x 20min [OIII], 4 x 20min [SII] Baader filterset. Maxim DL for image acquisition
Calibration Dark + Flat Frame
Guiding Meade DSI Pro II and Skywatcher ED80 as Guide Scope, Maxim DL as guiding software
Processing Maxim DL5,Registar,Photoshop. Color Code R:[SII], G:H-alpha, B:[OIII]
Location-Date Eningen, Germany 23,24 May + 13,14,19,20 July 2010
Remark 2-panel mosaic
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