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Ssc2004-07b
 

 

 

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English: Sometimes, the best way to understand how something works is to take it apart. The same is true for galaxies like NGC 300, which NASA's Spitzer Space Telescope has divided into its various parts. NGC 300 is a face-on spiral galaxy located 7.5 million light-years away in the southern constellation Sculptor.

This false-color image taken by the infrared array camera on Spitzer readily distinguishes the main star component of the galaxy (blue) from its dusty spiral arms (red). The star distribution peaks strongly in the central bulge where older stars congregate, and tapers off along the arms where younger stars reside.

Thanks to Spitzer's unique ability to sense the heat or infrared emission from dust, astronomers can now clearly trace the embedded dust structures within NGC 300's arms. When viewed at visible wavelengths, the galaxy's dust appears as dark lanes, largely overwhelmed by bright starlight. With Spitzer, the dust -- in particular organic compounds called polycyclic aromatic hydrocarbons -- can be seen in vivid detail (red). These organic molecules are produced, along with heavy elements, by the stellar nurseries that pepper the arms.

The findings provide a better understanding of spiral galaxy mechanics and, in the future, will help decipher more distant galaxies, whose individual components cannot be resolved.

This image was taken on Nov. 21, 2003 and is composed of photographs obtained at four wavelengths: 3.6 microns (blue), 4.5 microns (green), 5.8 microns (orange) and 8 microns (red).
Date 11 May 2004(2004-05-11)
Source http://www.spitzer.caltech.edu/images/1166-ssc2004-07b-Dissection-of-a-Galaxy-Spiral-Galaxy-NGC-300
Author NASA/JPL-Caltech/G. Helou (Caltech)

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

Licensing

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.)

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EXIF data:
File name ssc2004-07b.jpg
Size, bytes 1350892
Mime type image/jpeg
Orientation of image 1
Image resolution in width direction 300/1
Image resolution in height direction 300/1
Unit of X and Y resolution 2
Color space information 65535
Exif image width 1500
Exif image length 1200
Software used Adobe Photoshop 7.0
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