Multiwavelength M81



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English: This beautiful galaxy is tilted at an oblique angle on to our line of sight, giving a "birds-eye view" of the spiral structure. The galaxy is similar to our Milky Way, but our favorable view provides a better picture of the typical architecture of spiral galaxies.

M81 may be undergoing a surge of star formation along the spiral arms due to a close encounter it may have had with its nearby spiral galaxy NGC 3077 and a nearby starburst galaxy (M82) about 300 million years ago.

M81 is one of the brightest galaxies that can be seen from the Earth. It is high in the northern sky in the circumpolar constellation Ursa Major, the Great Bear. At an apparent magnitude of 6.8 it is just at the limit of naked-eye visibility. The galaxy's angular size is about the same as that of the Full Moon.

This image combines data from the Hubble Space Telescope, the Spitzer Space Telescope, and the Galaxy Evolution Explorer (GALEX) missions. The GALEX ultraviolet data were from the far-UV portion of the spectrum (135 to 175 nanometers). The Spitzer infrared data were taken with the IRAC channel 4 detector (8 microns). The Hubble data were taken at the blue portion of the spectrum.
Date 30 May 2007(2007-05-30)
Source http://www.spitzer.caltech.edu/images/2126-sig07-009-Multiwavelength-M81
Author NASA, JPL-Caltech, GALEX Team, J. Huchra et al. ; NASA/JPL/Caltech/S. Willner

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


Public domain This file is in the public domain because it was 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.)


Public Domain


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EXIF data:
File name multiwavelength_m81.jpg
Size, bytes 6227312
Mime type image/jpeg
Orientation of image 1
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Unit of X and Y resolution 2
Color space information 65535
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Software used Adobe Photoshop CS3 Macintosh
Copyright holder http://www.spitzer.caltech.edu/Media/mediaimages/copyright.shtml
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