![]() Background information and educational context for the images can be found at. This image and other images and data received from Galileo are posted on the Galileo mission home page at. JPL is a division of the California Institute of Technology in Pasadena. manages the Galileo mission for NASA's Office of Space Science, Washington, D.C. The Jet Propulsion Laboratory, Pasadena, Calif. ![]() ![]() These features may provide evidence for springs of some liquid, probably a sulfur compound rather than water. Arrows in the inset indicate some examples of these. Several intriguing, narrow, channel-like features about 10 meters (11 yards) wide and a few hundred meters (yards) long can be seen. Sublimation of sulfur-dioxide-rich substances, their transition from solid to gaseous form, may also play a role in the segregation of bright and dark materials. In places, layers of bright and dark material appear to have been exposed by some process of erosion. The surface is quite varied in appearance, ranging from smooth patches of material to the much rougher top of the promontory. Galileo scientists estimate that the promontory is up to 400 meters (one-fourth mile) high. A raised promontory at the bottom of the center image casts shadows into the lower right corner of the left image. The Sun illuminates the surface from the right, but topographic shading is difficult to see because of the strong contrasts in brightness of the surface materials. The image is centered at 32 degrees north latitude and 193 degrees west longitude The images are rotated relative to one another because of Galileo's great speed as it flies above the surface of Io. It is named after Io, one of Zeus s many. Io is the innermost of the four Galilean moons of Jupiter. The one on the horizon is 140km high, the other is 75km high. North is to the top of the images and the entire mosaic spans about 17 kilometers (11 miles) from east to west. The Puma concolor, or Felis concolor) is a type of large hunting cat found in North South America. This mosaic of images acquired by NASA's Galileo spacecraft on February 22, 2000, shows the highest resolution view ever obtained of the surface of Jupiter's volcanic moon Io, 5 to 6 meters (16 to 20 feet) per picture element.
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