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English: The tangled arms of the Pinwheel galaxy, otherwise known as Messier 101, are decked out in red in this new infrared image from NASA's Spitzer Space Telescope.
The Pinwheel galaxy is located 27 million light-years away in the constellation Ursa Major. It is what's called a flocculent spiral, which means that its spiral arms are not well defined.
The red color shows the dust, while the blue glow around the galaxy is from starlight.In this infrared composite, blue indicates light with a wavelength of 3.6 microns, green corresponds to 4.5 microns, and red to 5.8 and 8.0 microns. The contribution from starlight (measured at 3.6 microns) has been subtracted from the 5.8- and 8-micron images to enhance the visibility of the dust features.
|Date||8 Mar 2004 / 2008/07/21|
|Author||Karl D. Gordon (STScI) Charles W. Engelbracht (University of Arizona) George H. Rieke (University of Arizona) K. A. Misselt (University of Arizona) J.-D. T. Smith (University of Arizona) Robert C. Kennicutt Jr. (University of Cambridge)|
Image use policy: http://www.spitzer.caltech.edu/info/18-Image-Use-Policy
|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.)
|Orientation of image||1|
|Image resolution in width direction||720000/10000|
|Image resolution in height direction||720000/10000|
|Unit of X and Y resolution||2|
|Color space information||65535|
|Exif image width||2766|
|Exif image length||2766|
|Software used||Adobe Photoshop CS2 Windows|
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