File:Magellanic Cloud.jpg

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English: This image from NASA's Spitzer Space Telescope shows the Large Magellanic Cloud, a satellite galaxy to our own Milky Way galaxy.

The infrared image, a mosaic of 300,000 individual tiles, offers astronomers a unique chance to study the lifecycle of stars and dust in a single galaxy. Nearly one million objects are revealed for the first time in this Spitzer view, which represents about a 1,000-fold improvement in sensitivity over previous space-based missions. Most of the new objects are dusty stars of various ages populating the Large Magellanic Cloud; the rest are thought to be background galaxies.

The blue color in the picture, seen most prominently in the central bar, represents starlight from older stars. The chaotic, bright regions outside this bar are filled with hot, massive stars buried in thick blankets of dust. The red color around these bright regions is from dust heated by stars, while the red dots scattered throughout the picture are either dusty, old stars or more distant galaxies. The greenish clouds contain cooler interstellar gas and molecular-sized dust grains illuminated by ambient starlight.

Astronomers say this image allows them to quantify the process by which space dust the same stuff that makes up planets and even people is recycled in a galaxy. The picture shows dust at its three main cosmic hangouts: around the young stars, where it is being consumed (red-tinted, bright clouds); scattered about in the space between stars (greenish clouds); and in expelled shells of material from old stars (randomly-spaced red dots).

The Large Magellanic Cloud, located 160,000 light-years from Earth, is one of a handful of dwarf galaxies that orbit our own Milky Way. It is approximately one-third as wide as the Milky Way, and, if it could be seen in its entirety, would cover the same amount of sky as a grid of about 480 full moons. About one-third of the entire galaxy can be seen in the Spitzer image.

This picture is a composite of infrared light captured by Spitzer. Light with wavelengths of 3.6 (blue) and 8 (green) microns was captured by the telescope's infrared array camera; 24-micron light (red) was detected by the multiband imaging photometer.
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Author NASA/JPL-Caltech/M. Meixner (STScI) & the SAGE Legacy Team
Public domain 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.)
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28 August 2006

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Date/TimeThumbnailDimensionsUserComment
current10:49, 28 December 2011Thumbnail for version as of 10:49, 28 December 201113,250 × 13,250 (58.1 MB)Prof. ProfessorsonHighest resolution, from http://www.spitzer.caltech.edu/images/1670-ssc2006-17b1-Large-Magellanic-Cloud-in-the-Infrared (http://www.spitzer.caltech.edu/uploaded_files/images/0006/2139/ssc2006-17b1.jpg).
10:20, 28 December 2011Thumbnail for version as of 10:20, 28 December 20116,000 × 6,000 (7.32 MB)Bulwersatorfull image (from source)
10:14, 28 December 2011Thumbnail for version as of 10:14, 28 December 2011516 × 387 (63 KB)BulwersatorTransferred from en.wikipedia: see original upload log above

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