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Description	English: http://www.spitzer.caltech.edu/images/3230-sig10-013-Bright-Lights-Green-City Two extremely bright stars illuminate a greenish mist in this image from the Spitzer Space Telescope's "GLIMPSE360" survey. This mist is comprised of hydrogen and carbon compounds called polycyclic aromatic hydrocarbons (PAHs), which also are found here on Earth in sooty vehicle exhaust and on charred grills. In space, PAHs form in the dark clouds that give rise to stars. These molecules provide astronomers a way to visualize the peripheries of gas clouds and study their structures in great detail. They are not actually green; but are color coded in these images to allow scientists see their glow in infra-red. This image is a combination of data from Spitzer and the Two-Micron All-Sky Survey (2MASS).
Date	28 July 2010
Source	Spitzer
Author	NASA/JPL-Caltech/2MASS/SSI/University of Wisconsin

	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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	Date/Time	Thumbnail	Dimensions	User	Comment
current	17:13, 23 August 2010		6,000 × 4,500 (4.52 MB)	Originalwana	{{Information \|Description={{en\|1=Two extremely bright stars illuminate a greenish mist in this image from the Spitzer Space Telescope's "GLIMPSE360" survey. This mist is comprised

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