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File:NGC5585 - HST - Potw2038a.tif

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Description
English: Dark Matter Surplus


Resting on the tail of the Great Bear in the constellation of Ursa Major, lies NGC 5585, a spiral galaxy that is more than it appears.

The many stars, and dust and gas clouds that make up NGC 5585, shown here in this Hubble image, contribute only a small fraction of the total mass of the galaxy. As in many galaxies, this discrepancy can be explained by the abundant yet seemingly invisible presence of dark matter.

The stellar disc of the galaxy extends over 35 000 light-years across. When compared with galaxies of a similar shape and size, NGC 5585 stands out by having a notably different composition: Contributing to the total mass of the galaxy, it contains a far higher proportion of dark matter.

Hotspots of star formation can be seen along the galaxy’s faint spiral arms. These regions shine a brilliant blue, contrasting strikingly against the ever-black background of space.

Credit:

ESA/Hubble & NASA, R. Tully Acknowledgement: Gagandeep Anand 

Coordinates
Position (RA):  	14 19 49.61
Position (Dec): 	56° 43' 33.93"
Field of view:  	3.28 x 3.35 arcminutes
Orientation:    	North is 117.6° right of vertical

Colours & filters Band	Wavelength 	Telescope
Optical V       	606 nm   	Hubble Space Telescope ACS
Optical I       	814 nm   	Hubble Space Telescope ACS
.
Date
Source https://spacetelescope.org/images/potw2038a/
Author Credit: ESA/Hubble & NASA, R. Tully, Acknowledgement: Gagandeep Anand
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current12:32, 21 September 2020Thumbnail for version as of 12:32, 21 September 20206,568 × 6,709 (89.52 MB)Fabian RRRR (talk | contribs){{Information |description ={{en|1='''Dark Matter Surplus Resting on the tail of the Great Bear in the constellation of Ursa Major, lies NGC 5585, a spiral galaxy that is more than it appears. The many stars, and dust and gas clouds that make up NGC 5585, shown here in this Hubble image, contribute only a small fraction of the total mass of the galaxy. As in many galaxies, this discrepancy can be explained by the abundant yet seemingly invisible presence of dark matter. The stellar disc...

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