Image:Io Culann Patera.jpg

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[edit] Summary

Original caption from http://pirlwww.lpl.arizona.edu/missions/Galileo/releases/19May_i25culann.html:

Culann Patera in (false) color

This mosaic of Culann Patera, one of the most colorful volcanic centers on Io, is the best, high-resolution, color view of Io that has been returned by NASA's Galileo spacecraft. The picture was constructed from images taken through the red, green, and violet filters of Galileo's camera and has been processed to enhance the color variations. The resolution is about 200 meters (or yards) per picture element and North is to the top.

The color mosaic shows the complex relationships between the diffuse red deposit, the more confined green deposit, and the various colored lava flows. Culann's central caldera (above and to the right of center) has a highly irregular, scalloped margin and a green-colored floor. Lava flows spill out of the caldera on all sides. A dark red, curving line extending northwest from the southwestern tip of the caldera may mark a crusted-over lava tube feeding the dark (and hot) silicate flows to the northwest. Unusual dark red flows to the southeast of the caldera may be sulfur flows or silicate flows whose surfaces have been modified. The diffuse red material around the caldera is believed to be a compound of sulfur deposited from a plume of gas.

Culann's caldera and several lava flows extending from the caldera are coated by greenish materials. Green material can also be seen in the caldera to the lower right of the image, named Tohil Patera. The greenish material often has sharp boundaries, so it is apparently confined to the caldera floor and the dark flows. Galileo scientists are investigating whether the greenish material forms as a coating of sulfur-rich material on warm silicate lavas.

The images were taken on 25 November, 1999 during Galileo's 25th orbit at a distance of 20,000 kilometers (12,500 miles) from Io.

Image produced by: Cynthia Phillips Planetary Image Research Lab. (PIRL) , Lunar and Planetary Lab. (LPL), University of Arizona

The Jet Propulsion Laboratory, Pasadena, CA manages the Galileo mission for NASA's Office of Space Science, Washington, DC. JPL is a division of the California Institute of Technology, Pasadena, CA.

This image and other images and data received from Galileo are posted on the World Wide Web, on the Galileo mission home page at http://galileo.jpl.nasa.gov/. Background information and educational context for the images can be found at .nasa.gov/images/io/ioimages.html http://galileo.jpl .nasa.gov/images/io/ioimages.html.

[edit] Licensing

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". (NASA copyright policy page or JPL Image Use Policy) Warnings: Use of NASA logos, insignia and emblems are restricted per US 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 in the public domain. Materials from the Hubble Space Telescope may be copyrighted if they do not explicitly come from the STScI. [1] All materials created by the SOHO 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]

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