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21 Aug, 2019
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File:Veil Nebula (partial) (noao-veilw).jpg

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	18:29, 17 September 2023		1,366 × 2,040 (2.47 MB)	OptimusPrimeBot	#Spacemedia - Upload of https://noirlab.edu/public/media/archives/images/large/noao-veilw.jpg via Commons:Spacemedia

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Veil Nebula

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- NGC 6960
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- はくちょう座

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Image title	The Veil nebula, also known as the Cygnus Loop, is an enormous region of diffuse gas emission, covering several degrees on the sky. Although this image is over a degree across (more than 40 light-years), using the full wide-field capability of the Schmidt telescope, it still shows only the western segment (NGC6960) of the entire object (over 100 light-years in width). The nebula is the remnant of a supernova explosion which occurred more than 20000 years ago. It consists mostly of interstellar matter swept up by the material flung off by the exploding star, and it still shines because of excitation due to the collision between this expanding shock wave and the interstellar medium. The Veil nebula also emits X-rays, although they are weaker than those from younger supernova remnants such as Cassiopeia A, since the shock loses energy as it plows through its surroundings. Supernova explosions are perhaps the most spectacular events in our Galaxy, occurring when a star throws off its outer layers at speeds of ten to twenty thousand kilometers per second, leaving behind sometimes nothing, sometimes a shriveled remnant neutron star, or sometimes even a totally collapsed black hole. Location: 20h 56m 24s +31deg 43min (1950.0), constellation of Cygnus. Distance: around 2500 light-years. This image was made by combining a number of exposures taken on the night of July 15th 1996, with a 2048x2048 CCD detector at the Burrell Schmidt telescope of the Warner and Swasey Observatory of Case Western Reserve University (CWRU), situated on Kitt Peak in southern Arizona. These observations were made during the telescope training part of the Research Experience for Undergraduates (REU) program operated by NOAO/Tucson and funded by the National Science Foundation. See also this eastern section of the nebula.
Credit/Provider	N.A.Sharp, REU program/NOIRLab/NSF/AURA
Source	NSF's NOIRLab
Short title	Veil Nebula (partial)
Usage terms	Creative Commons Attribution 4.0 International License
Date and time of data generation	21:34, 30 June 2020
Keywords	NGC 6960 Veil Nebula
Contact information	https://noirlab.edu 950 North Cherry Ave. Tucson, AZ, 85719 USA
IIM version	4

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