Photo of Infrared Views of Messier 81

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Description	English: The magnificent and dusty spiral arms of the nearby galaxy Messier 81 are highlighted in these NASA Spitzer Space Telescope images. Located in the northern constellation of Ursa Major (which also includes the Big Dipper), this galaxy is easily visible through binoculars or a small telescope. M81 is located at a distance of 12 million light-years. The three-panel mosaic is a series of images obtained with the multiband imaging photometer. Thermal infrared emission at 24 microns (top), 70 microns (center) and 160 microns (bottom) is shown in the images. Note that the effective spatial resolution degrades as ones moves to longer wavelengths. At these wavelengths, Spitzer sees the dust, rather than the stars, within the disc of silicates and carbonaceous grains. It is well-mixed with gas, which is best seen at radio wavelengths, to form the essential ingredients for future star formation.
Date	24 November 2003
Source	https://www.spitzer.caltech.edu/images/1086-ssc2003-06e-Messier-81
Author	NASA/JPL-Caltech/K. Gordon (University of Arizona)

Image use policy: https://www.spitzer.caltech.edu/info/18-Image-Use-Policy

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The magnificent and dusty spiral arms of the nearby galaxy Messier 81 are highlighted in these NASA Spitzer Space Telescope images. Located in the northern constellation of Ursa Major (which also includes the Big Dipper), this galaxy is easily visible through binoculars or a small telescope. M81 is located at a distance of 12 million light-years. The three-panel mosaic is a series of images obtained with the multiband imaging photometer. Thermal infrared emission at 24 microns (top), 70 microns (center) and 160 microns (bottom) is shown in the images. Note that the effective spatial resolution degrades as ones moves to longer wavelengths. At these wavelengths, Spitzer sees the dust, rather than the stars, within the disc of silicates and carbonaceous grains. It is well-mixed with gas, which is best seen at radio wavelengths, to form the essential ingredients for future star formation. Date 24 November 2003 Source http://www.spitzer.caltech.edu/images/1086-ssc2003-06e-Messier-81 Author NASA/JPL-Caltech/K. Gordon (University of Arizona) Image use policy: http://www.spitzer.caltech.edu/info/18-Image-Use-Policy [edit] Licensing Public domainPublic domainfalsefalse

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EXIF data:
File name	infrared_views_of_messier_81.jpg
Size, Mbytes	1.2367705078125
Mime type	image/jpeg
Orientation of image	1
Image resolution in width direction	300
Image resolution in height direction	300
Unit of X and Y resolution	2
Color space information	1
Exif image width	2000
Exif image length	2500
Software used	Adobe Photoshop CS3 Macintosh
Copyright holder	0

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