File:Cassiopeia A (1999-0237 - 0237 optical).tiff

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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	MDM/R. Fesen
Other versions	JPG version

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	This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
	Warnings: Use of NASA logos, insignia and emblems is restricted per U.S. law 14 CFR 1221. The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain. Materials based on Hubble Space Telescope data may be copyrighted if they are not explicitly produced by the STScI.[1] See also {{PD-Hubble}} and {{Cc-Hubble}}. The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [2] Images featured on the Astronomy Picture of the Day (APOD) web site may be copyrighted. [3] The National Space Science Data Center (NSSDC) site has been known to host copyrighted content. Its photo gallery FAQ states that all of the images in the photo gallery are in the public domain "Unless otherwise noted."

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	23:11, 27 May 2024		2,250 × 2,263 (5.29 MB)	OptimusPrimeBot (talk \| contribs)	#Spacemedia - Upload of https://chandra.si.edu/photo/1999/0237/0237_optical.tif 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
Width	2,250 px
Height	2,263 px
Bits per component	8 8 8
Compression scheme	LZW
Pixel composition	RGB
Orientation	Normal
Number of components	3
Number of rows per strip	1
Horizontal resolution	300 dpi
Vertical resolution	300 dpi
Data arrangement	chunky format
Exif version	2.21
Color space	sRGB

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File:Cassiopeia A (1999-0237 - 0237 optical).tiff

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Michigan-Dartmouth-MIT Observatory

copyright status

public domain

location of creation

Michigan-Dartmouth-MIT Observatory

media type

image/tiff

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2,263 pixel

width

2,250 pixel

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photograph

data size

5,546,456 byte

checksum

64b283d3db169d3705176a0f514e6fe4d7e2b430

inception

26 August 1999

constellation

Cassiopeia

source of file

file available on the internet

pHash checksum

1f0dpu8fidc4aiw5ytuh5wfjloowb2e9lo1appole5qize5zy7

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File:Cassiopeia A (1999-0237 - 0237 optical).tiff

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