Jamming with the ‘Spiders’ from Mars(来自火星"蜘蛛"的干扰)

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from https://www.nasa.gov/sites/default/files/thumbnails/image/pia22587.jpg

上图经过了压缩,原图有大约1.4 MB, 原图请访问 HERE .
The picture above has been compressed. The original picture is about 1.4 MB and it’s HERE .

This image from NASA’s Mars Reconnaissance Orbiter, acquired May 13, 2018 during winter at the South Pole of Mars, shows a carbon dioxide ice cap covering the region and as the sun returns in the spring, “spiders” begin to emerge from the landscape.


But these aren’t actual spiders. Called “araneiform terrain,” describes the spider-like radiating mounds that form when carbon dioxide ice below the surface heats up and releases. This is an active seasonal process not seen on Earth. Like dry ice on Earth, the carbon dioxide ice on Mars sublimates as it warms (changes from solid to gas) and the gas becomes trapped below the surface.


Over time the trapped carbon dioxide gas builds in pressure and is eventually strong enough to break through the ice as a jet that erupts dust. The gas is released into the atmosphere and darker dust may be deposited around the vent or transported by winds to produce streaks. The loss of the sublimated carbon dioxide leaves behind these spider-like features etched into the surface.


The University of Arizona, Tucson, operates HiRISE, which was built by Ball Aerospace & Technologies Corp., 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.

亚利桑那大学图森分校运转着 HiRISE, HiRISE 由位于科罗拉多州博尔德的Ball航天技术公司建造.NASA 喷气推进实验室是位于加利福尼亚州帕萨迪纳市的加州理工学院的一个分部,该分部为位于华盛顿的美国宇航局科学任务局管理着火星侦测轨道飞行器项目.

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Last Updated: July 13, 2018
Editor: Tony Greicius

原文标题:Jamming with the ‘Spiders’ from Mars

The picture in this article and the English original text are all from NASA, DaoHangGou translated the original text and translated for reference only.
Original link: https://www.nasa.gov/image-feature/jpl/jamming-with-the-spiders-from-mars
Original title: Jamming with the ‘Spiders’ from Mars