File:Cassiopeia A (1999-0237 - 0237 infrared).jpg

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Cas A is the remnant of a star that exploded about 300 years ago. The X-ray image shows an expanding shell of hot gas produced by the explosion.

Summary

Description	English: Cas A is the remnant of a star that exploded about 300 years ago. The X-ray image shows an expanding shell of hot gas produced by the explosion. This gaseous shell is about 10 light years in diameter, and has a temperature of about 50 million degrees.
Date	26 August 1999 (upload date)
Source	Cassiopeia A: First Light
Author	ESA/ISO, CAM, P. Lagage et al.
Other versions	TIFF version

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	23:11, 27 May 2024		504 × 504 (75 KB)	OptimusPrimeBot (talk \| contribs)	#Spacemedia - Upload of https://chandra.si.edu/photo/1999/0237/0237_infrared_lg.jpg via Commons:Spacemedia

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This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.

Image title	This X-ray image of the Cassiopeia A (Cas A) supernova remnant is the official first light image of the Chandra X-ray Observatory. The 5,000 second image was made with the Advanced CCD Imaging Spectrometer (ACIS). Two shock waves are visible: a fast outer shock and a slower inner shock. The inner shock wave is believed to be due to the collision of the ejecta from the supernova explosion with a circumstellar shell of material, heating it to a temperature of ten million degrees Celsius. The outer shock wave is analogous to an awesome sonic boom resulting from this collision. The bright object near the center may be the long sought neutron star or black hole that remained after the explosion that produced Cas A.
Author	Chandra X-ray Observatory Center
Credit/Provider	NASA/CXC/SAO
Headline	The remnant of a star that exploded about 300 years ago in the constellation Cassiopeia.
Source	Chandra X-ray Observatory
Short title	First Light
Usage terms	http://chandra.harvard.edu/photo/image_use.html
Date and time of data generation	26 August 1999
JPEG file comment	File written by Adobe Photoshop¨ 5.0
Orientation	Normal
Exif version	2.21
Color space	sRGB
Date metadata was last modified	11:05, 1 December 2011
Unique ID of original document	51CC7E39C82A51815E51EC87E00BFEAC
Keywords	Cassiopeia A
Contact information	cxcpub@cfa.harvard.edu http://chandra.harvard.edu 60 Garden St. Cambridge, MA, 02138 USA 617.496.7941
IIM version	4

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File:Cassiopeia A (1999-0237 - 0237 infrared).jpg

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