July 30, 2012
Credits: NASA/JPL/Univ. of Arizona - Galileo Project - Credits for the additional process. and color.: Dr Paolo C. Fienga/Lunar Explorer Italia/IPF
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Today's APOD is an image-composite of 3 (three) frames of the Minos Linea Region on Jupiter's moon Europa; the 3 (three) different images were taken on June, 28, of the AD 1996, by the Solid State Imaging Camera onboard NASA's - Galileo Spacecraft. Surface Features (typical on Europa) like Triple Bands, Lineae and Mottled Terrains show dark-brown and reddish hues, so indicating the presence of (possible) contaminants in the Ice. The Icy Plains, instead (which are shown here in a gray/whitish color), are subdivided into "Units", each showing different Albedos (---> Reflectivity) at InfraRed Wavelengths (probably because of the differences in the Grain-size of the Ice). The composite was produced using images with Effective Wavelengths at 989, 757, and 559 nanometers. The Spatial Resolution in each the individual image ranges from approx. 1,6 to 3,3 Km (such as about 1 to 2 miles) per pixel. The area shown here is centered at about 45° North Lat. and 221° West Long. and is approx. 1260 km (such as about 780 miles) across. This frame has been colorized in Absolute Natural Colors (such as the colors that a human eye would actually perceive if someone were onboard the NASA - Galileo Spacecraft and then looked outside, towards the Surface of the Jovian moon Europa), by using an original technique created - and, in time, dramatically improved - by the Lunar Explorer Italia Team. |
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