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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.
这张来自NASA火星侦测轨道飞行器的图像拍摄于2018年05月13日的火星南极，当时，火星的南极正处于冬季．图像上的该区域覆盖着二氧化碳冰盖，当春天的阳光重新照射在这里的时候，＂蜘蛛＂就开始从地表浮现出来了．
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.
但是，这不是真实的蜘蛛．这些＂蜘蛛＂被称作＂蜘蛛状地形＂，描述了当地表下的二氧化碳冰受热释放时形成的蜘蛛状的辐射丘．这是一个在地球上从未被观测到的活跃的季节性活动过程．就像地球上的干冰一样，火星上的二氧化碳冰也会随着温度的升高而升华（从固态变成气态）并且这些气体将被困在地表之下．
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.
随着时间的推移，这些被困在地表以下的二氧化碳将积聚足够的压力并最终冲破地表的二氧化碳冰，就像能喷射灰尘的喷气机一样．气体被释放进火星大气，黑色的灰尘则会在排气孔周围积聚，或者受到风的吹动而形成条纹．升华并流失的二氧化碳在地表刻下了这些蜘蛛状的条纹特征．
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
声明：
本文中的图片和英文原文均来自NASA，由导航狗对原文进行翻译，译文仅供参考。
原文链接：https://www.nasa.gov/image-feature/jpl/jamming-with-the-spiders-from-mars
原文标题：Jamming with the ‘Spiders’ from MarsManifesto:
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