File:Sublimation Of Ice In Martian Spring.jpg

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English: In spring, the sublimation of the ice (going directly from ice to gas) causes a host of uniquely Martian phenomena. In this image streaks of dark basaltic sand have been carried from below the ice layer to form fan-shaped deposits on top of the seasonal ice. The similarity in the directions of the fans suggests that they formed at the same time, when the wind direction and speed was the same. They often form along the boundary between the dune and the surface below.
日期
来源 HiRISE
作者 NASA/JPL/University of Arizona

Local Mars time: 1:50 PM. Latitude (centred): 80.0 °. Longitude (East): 122.5 °. Range to target site: 319.0 km. Original image scale range: 31.9 cm/pixel (with 1 x 1 binning) so objects ~96 cm across are resolved. Map projected scale: 25 cm/pixel. Map projection: POLAR STEREOGRAPHIC. Emission angle: 2.6 °. Phase angle: 67.3 °. Solar incidence angle: 69 °, with the Sun about 21 ° above the horizon. Solar longitude: 29.7 °. Northern Spring.

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Public domain 本文件完全由NASA创作,在美国属于公有领域。根据NASA的版权方针,NASA的材料除非另有声明否则不受版权保护。(参见Template:PD-USGov/zhNASA版权方针页面JPL图片使用方针。)
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