Daily Archives: July 26, 2014

NGC 253: Dusty Island Universe 

Image Credit & Copyright: László Francsics

 Shiny NGC 253 is one of the brightest spiral galaxies visible, and also one of the dustiest. Some call it the Silver Dollar Galaxy for its appearance in small telescopes, or just the Sculptor Galaxy for its location within the boundaries of the southern constellation Sculptor. First swept up in 1783 by mathematician and astronomer Caroline Herschel, the dusty island universe lies a mere 10 million light-years away. About 70 thousand light-years across, NGC 253 is the largest member of the Sculptor Group of Galaxies, the nearest to our own Local Group of Galaxies. In addition to its spiral dust lanes, tendrils of dust seem to be rising from a galactic disk laced with young star clusters and star forming regions in this sharp color image. The high dust content accompanies frantic star formation, earning NGC 253 the designation of a starburst galaxy. NGC 253 is also known to be a strong source of high-energy x-rays and gamma rays, likely due to massives black hole near the galaxy’s center.

APOD NASA 26-Jul-2014

NGC 4236 in Draco

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NGC 4236 (also known as Caldwell 3) is a barred spiral galaxy located in the constellation DracoNGC 4236 is a member of the M81 Group, a group of galaxies located at a distance of approximately 11.7 Mly (3.6 Mpc) from Earth. The group also contains the well-known spiral galaxy Messier 81 and the well-known starburst galaxy Messier 82.

Imaging telescopes or lenses: AG Optical 12.5 IDK
Imaging cameras: Apogee U16M
Mounts: Paramount MX
Filters: Astrodon E-series LRGB
Dates: March 31, 2014
Locations: New Mexico Skies
Frames: 55×900″
Integration: 13.8 hours

Author: Mike Miller
AstroPhotography of the day by SPONLI 26 July 2014