File:PIA24468-Mars-Scallops-20210322.jpg
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[編輯]描述PIA24468-Mars-Scallops-20210322.jpg |
English: Mars - Scallop Landforms - March 22, 2021
PIA24468: A Recipe for Martian Scallops https://photojournal.jpl.nasa.gov/catalog/PIA24468 This image acquired on August 17, 2020 by NASA's Mars Reconnaissance Orbiter, shows Martian scallops. As the ice ablates away in some spots the surface dust collapses into the hole that's left. About a third of Mars has water ice just below the dusty surface. Figuring out exactly where is vital for future human explorers. One of the ways scientists do this is to look for landforms that only occur when this buried ice is present. These scallops are one of those diagnostic landforms. A layer of clean ice lies just below the surface in this image. As the ice ablates away in some spots the surface dust collapses into the hole that's left. These holes grow into the scallops visible here as more and more ice is lost. Between the scallops, the ice is still there, ready for some astronaut to come along and dig it up. The map is projected here at a scale of 25 centimeters (9.8 inches) per pixel. (The original image scale is 24.8 centimeters [9.8 inches] per pixel [with 1 x 1 binning]; objects on the order of 75 centimeters [30.0 inches] across are resolved.) North is up. The University of Arizona, in Tucson, operates HiRISE, which was built by Ball Aerospace & Technologies Corp., in Boulder, Colorado. NASA's Jet Propulsion Laboratory, a division of Caltech in Pasadena, California, manages the Mars Reconnaissance Orbiter Project for NASA's Science Mission Directorate, Washington. |
日期 | |
來源 | https://photojournal.jpl.nasa.gov/jpeg/PIA24468.jpg |
作者 | NASA/JPL-Caltech/University of Arizona |
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[編輯]Public domainPublic domainfalsefalse |
本作品由NASA創作,屬於公有領域。根據NASA的版權政策:“NASA的創作除非另有聲明否則不受版權保護。”(參見:Template:PD-USGov/zh,NASA版權政策或JPL圖像使用政策) | ||
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目前 | 2021年3月23日 (二) 14:43 | 2,880 × 1,800(955 KB) | Drbogdan(留言 | 貢獻) | Uploaded a work by NASA/JPL-Caltech/University of Arizona from https://photojournal.jpl.nasa.gov/jpeg/PIA24468.jpg with UploadWizard |
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