Fil:Ssc2003-06c.jpg

Størrelse på denne forhåndsvisningen: 791 × 600 piksler. Andre oppløsninger: 317 × 240 piksler | 633 × 480 piksler | 1 013 × 768 piksler | 1 280 × 971 piksler | 1 358 × 1 030 piksler.

Opprinnelig fil ‎(1 358 × 1 030 piksler, filstørrelse: 1,27 MB, MIME-type: image/jpeg)

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Beskrivelse

The spiral arms of the nearby galaxy Messier 81 are highlighted in this NASA Spitzer Space Telescope image. 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.

Because of its proximity, M81 provides astronomers with an enticing opportunity to study the anatomy of a spiral galaxy in detail. The unprecedented spatial resolution and sensitivity of Spitzer at infrared wavelengths show a clear separation between the several key constituents of the galaxy: the old stars, the interstellar dust heated by star formation activity, and the embedded sites of massive star formation. The infrared images also permit quantitative measurements of the galaxy's overall dust content, as well as the rate at which new stars are being formed.

Dato

6. november 2003

Kilde

http://www.spitzer.caltech.edu/Media/releases/ssc2003-06/ssc2003-06c.shtml (TIFF image)

Opphavsperson

NASA/JPL-Caltech/S. Willner (Harvard-Smithsonian Center for Astrophysics)

Tillatelse
(Gjenbruk av denne filen)

	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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	Dato/klokkeslett	Miniatyrbilde	Dimensjoner	Bruker	Kommentar
nåværende	3. mar. 2010 kl. 18:14		1 358 × 1 030 (1,27 MB)	Tryphon	Removed border from TIFF file, then converted to JPEG, from http://www.spitzer.caltech.edu/Media/releases/ssc2003-06/ssc2003-06c.shtml (http://ipac.jpl.nasa.gov/media_images/ssc2003-06c.tif).
	30. mai 2007 kl. 09:05		1 500 × 1 200 (1,11 MB)	ArchetypeRyan~commonswiki	This is an image of the spiral galaxy M81 taken by the Spitzer Space Telescope and distributed by NASA. It was provided by the Spitzer Space Telescope Newsroomhttp://www.spitzer.caltech.edu/Media/releases/ssc2003-06/ssc2003-06c.shtml.