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Contains:  NGC 6946
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The Fireworks Galaxy, 





    
        

            Gabe Shaughnessy
The Fireworks Galaxy

The Fireworks Galaxy

Technical card

Resolution: 3200x2400

Dates:July 31, 2016

Frames:
Astrodon LRGB CCD Imaging Filters (E-Series), Gen2: 300x24" bin 1x1
Astrodon Luminance E-Series Gen 2: 17x600" bin 1x1

Integration: 4.8 hours

Avg. Moon age: 27.05 days

Avg. Moon phase: 6.81%

Bortle Dark-Sky Scale: 5.00

Astrometry.net job: 1172647

RA center: 20h 34' 56"

DEC center: +60° 9' 18"

Pixel scale: 0.498 arcsec/pixel

Orientation: -88.857 degrees

Field radius: 0.276

Data source: Backyard

Description

The Fireworks Galaxy, NGC6946, is a spiral galaxy in the constellation Cygnus and lies some 18 million light-years away. It is receding away from us at 48 km/s due to the expansion of the universe. True to its name, the Fireworks Galaxy has had many supernovae since observations began, with 8 occurring in the past century alone. Star forming regions stand out as the red knots throughout the spiral arms and renew the stellar population.

The core of this galaxy has a distinctive orange-reddish hue. This is due to the line-of-sight through the dust of our own Milky Way galaxy, and is known as galactic extinction. The intervening dust preferentially scatters blue light and passes red light, in the same way the sky scatters sunlight during the sunset. Since the position of this galaxy is just north of the Cygnus arm of our galaxy, you could think of it as a galactic sunset on our Milky Way. From an observer in NGC6946, the Milky Way would appear as a nearly edge-on spiral galaxy in a similar appearance as NGC4565

Comments

Author

AstroGabe
Gabe Shaughnessy
License: Attribution-NonCommercial Creative Commons
2431
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The Fireworks Galaxy, 





    
        

            Gabe Shaughnessy