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File:Jupiter's moon Amalthea photographed by Galileo.jpg

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Jupiter's_moon_Amalthea_photographed_by_Galileo.jpg (798 × 573 pixels, file size: 19 KB, MIME type: image/jpeg)

Summary

Description
English: These four images of Jupiter's moon, Amalthea, were taken by Galileo's solid state imaging system at various times between February and June 1997. North is approximately up in all cases. Amalthea, whose longest dimension is approximately 247 kilometers (154 miles) across, is tidally locked so that the same side of the satellite always points towards Jupiter, similar to how the nearside of our own Moon always points toward Earth. In such a tidally locked state, one side of Amalthea always points in the direction in which Amalthea moves as it orbits about Jupiter. This is called the "leading side" of the moon and is shown in the top two images. The opposite side of Amalthea, the "trailing side," is shown in the bottom pair of images. The Sun illuminates the surface from the left in the top left image and from the right in the bottom left image. Such lighting geometries, similar to taking a picture from a high altitude at sunrise or sunset, are excellent for viewing the topography of the satellite's surface such as impact craters and hills. In the two images on the right, however, the Sun is almost directly behind the spacecraft. This latter geometry, similar to taking a picture from a high altitude at noon, washes out topographic features and emphasizes Amalthea's albedo (light/dark) patterns. It emphasizes the presence of surface materials that are intrinsically brighter or darker than their surroundings. The bright albedo spot that dominates the top right image is located inside a large south polar crater named Gaea.
Date
Source PIA01074: Four Galileo Views of Amalthea
Author NASA
Permission
(Reusing this file)
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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Licensing

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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  • 2004-06-18 18:29 Curps 798×573×8 (19663 bytes) {{PD-USGov}} Courtesy NASA/JPL-Caltech ([http://www.jpl.nasa.gov/images/policy/index.cfm])

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26 March 1998

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current09:10, 7 May 2007Thumbnail for version as of 09:10, 7 May 2007798 × 573 (19 KB)Thomas Reid{{Information |Description=Courtesy NASA/JPL-Caltech ([http://www.jpl.nasa.gov/images/policy/index.cfm]) Jupiter's moon Amalthea, photographed by Galileo. |S

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