File:M31- Chandra X-ray-Optical Composite (2000-0007-more-2).jpg

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English

X-ray/Optical Composite This composite shows the optical image of M31 with an inset consisting of the Chandra X-ray image of the nucleus. An approximate temperature scale is also shown for the X-ray image.

Summary

Description	English: X-ray/Optical Composite This composite shows the optical image of M31 with an inset consisting of the Chandra X-ray image of the nucleus. An approximate temperature scale is also shown for the X-ray image. In order to emit X-rays, gas must be very hot: hotter than a million degrees Centigrade. The gas falling into the super massive black hole in the nucleus of M31 is cool only by comparison to the other X-ray emitting stars and black holes nearby: They are typically 20 million degrees!
Date	14 January 2000 (upload date)
Source	X-ray/Optical Composite
Author	(Credit: X-ray: NASA/CXC/SAO; Optical: M.Garcia, S.Murray, Palomar Sky Survey)
Other versions	TIFF 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	18:54, 13 June 2024		864 × 576 (284 KB)	OptimusPrimeBot (talk \| contribs)	#Spacemedia - Upload of https://chandra.si.edu/photo/2000/0007/0007_xray_opt_comp.jpg via Commons:Spacemedia

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Credit/Provider	NASA/CXC/SAO
Headline	Our nearest neighbor spiral galaxy at a distance of two million light years.
Source	Chandra X-ray Observatory
Short title	Chandra Images Heart of Andromeda Galaxy
Image title	This X-ray image shows the central portion of the Andromeda Galaxy. The blue dot in the center of the image is an unusual "cool" million degree X-ray source of unknown nature. Just above this cool source is a source (yellow) that is thought to be due to X-rays from matter swirling toward a supermassive black hole in the nucleus of the galaxy. This black hole contains the mass of 30 million suns. Numerous other X-ray sources are also apparent. Most of these are probably due to X-ray binary systems, in which a neutron star or black hole is in a close orbit around a normal star.
Author	Chandra X-ray Observatory Center
Usage terms	http://chandra.harvard.edu/photo/image_use.html
Date and time of data generation	14 January 2000
Exif version	2.21
Image width	864 px
Image height	576 px
Color space	Uncalibrated
Width	864 px
Height	576 px
Pixel composition	RGB
Number of components	3
Horizontal resolution	72 dpi
Vertical resolution	72 dpi
Bits per component	8 8 8
Date metadata was last modified	11:25, 10 December 2010
Contact information	cxcpub@cfa.harvard.edu http://chandra.harvard.edu 60 Garden St. Cambridge, MA, 02138 USA 617.496.7941
Keywords	M31 Andromeda
IIM version	2

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File:M31- Chandra X-ray-Optical Composite (2000-0007-more-2).jpg

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Chandra X-ray Observatory

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public domain

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high Earth orbit

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576 pixel

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864 pixel

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satellite imagery

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photograph

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290,650 byte

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14 January 2000

source of file

file available on the internet

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3flwtb2xc9nualfmube06jggara4l95dduy5gws68m5421teg6

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