File:TitanAtmModel.jpg

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MODEL OF TITAN'S ATMOSPHERE

Titan presents an environment that appears to be unique in the solar system, with a thick, hazy atmosphere containing organic (or carbon-based) compounds, an organic ocean or lakes, and a rich soil filled with frozen molecules similar to what scientists believe led to the origin of life on Earth. The major differences between Titan and Earth are Titan's absence very low temperatures and an absence of liquid water. Scientists believe that the surface temperatures on Titan are cold enough to preclude any biological activity whatsoever at Titan.

As on Earth, the dominant atmospheric constituent in Titan's atmosphere is nitrogen. Methane represents about six percent of the atmosphere. Titan's surface pressure is 1.6 times that on Earth, despite Titan's smaller size. The surface temperature was found by Voyager to be 95 degrees Kelvin (minus 289 degrees Fahrenheit).

The opacity of Titan's atmosphere is caused by naturally produced photochemical smog. Voyager's infrared spectrometer detected many minor constituents produced primarily by photochemistry of methane, which produces hydrocarbons such as ethane, acetylene and propane. With Titan's smoggy sky and distance from the Sun, a person standing on Titan's surface in the daytime would experience a level of daylight equivalent to about 1/1,000th the daylight at Earth's surface.

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http://www.jpl.nasa.gov/media/cassini-102504/visuals.html (cutting)

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NASA/JPL

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	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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	Date/Time	Thumbnail	Dimensions	User	Comment
current	21:11, 24 September 2007		725 × 893 (103 KB)	Lotse (talk \| contribs)	{{Information \|Description='''MODEL OF TITAN'S ATMOSPHERE''' * Titan presents an environment that appears to be unique in the solar system, with a thick, hazy atmosphere containing organic (or carbon-based) compounds, an organic ocean or lakes, and a rich

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File:TitanAtmModel.jpg

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