File:Cassiopeia A- First Light (1999-0237 - 0237 xray).tiff

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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.

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	NASA/CXC/SAO
Other versions	TIFF version JPG version TIFF version TIFF version JPG version JPG version PDF version JPG version
Also Known As InfoField	Cas A
Category InfoField	Supernovas & Supernova Remnants
Color Code InfoField	Intensity
Constellation InfoField	Cassiopeia
Coordinates (J2000) InfoField	RA 23h 23m 26s
Distance Estimate InfoField	11,000 light years
Observation Date(s) InfoField	August 19, 1999
Observation ID(s) InfoField	214
Observation Time InfoField	1 hours
Scale InfoField	Image is 6 arcmin across.
Instruments InfoField	ACIS

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current	23:11, 27 May 2024		2,100 × 2,100 (3.49 MB)	OptimusPrimeBot (talk \| contribs)	#Spacemedia - Upload of https://chandra.si.edu/photo/1999/0237/0237_xray.tif via Commons:Spacemedia

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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
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Width	2,100 px
Height	2,100 px
Compression scheme	LZW
Pixel composition	RGB
Orientation	Normal
Number of components	4
Number of rows per strip	31
Horizontal resolution	300 dpi
Vertical resolution	300 dpi
Data arrangement	chunky format
Software used	Adobe Photoshop CS3 Macintosh
File change date and time	01:08, 5 March 2008
Exif version	2.21
Color space	sRGB

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File:Cassiopeia A- First Light (1999-0237 - 0237 xray).tiff

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