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[美图共赏]土星上历久不散的电暴

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发表于 2008-5-5 13:52 | 显示全部楼层 |阅读模式
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2008 May 5

A Persistent Electrical Storm on Saturn
Credit: Cassini Imaging Team, SSI, JPL, ESA, NASA

Explanation: How do large storms evolve on Saturn? On Earth, a hurricane can persist for weeks, while the Great Red Spot on Jupiter has been in existence for over 150 years. On Saturn, a storm system has now set a new endurance record, now being discernable for greater than three months. Electrical signals were detected from the storm in late November of 2007, while the above image was taken in early March 2008. The storm has roughly the width of planet Earth. Planetary scientists hypothesize that the storm runs deep into Saturn's cloud tops. The above image is shown in exaggerated colors combining violet and green light with light normally too red for humans to see. Visible on the upper right are shadows of Saturn's expansive ring system. Careful inspection will reveal Saturn's small moon Janus just below a ring shadow. Understanding weather on other planets helps atmospheric scientists better understand our Earth's weather. Observers of our Solar System's huge ringed world will be tracking the storm to see how it evolves and how long it will ultimately last.
发表于 2008-5-5 15:16 | 显示全部楼层
“江”“月”最近老是抢发帖呀
发表于 2008-5-5 17:06 | 显示全部楼层

译文:土星上长时间存在的闪电风暴

土星上巨大的风暴是如何演变的?在地球上,一次飓风会持续数周之久,而木星上的大红斑却已经存在了150多年了。而在土星上,有一个风暴系统又创造了一项新记录,它已经持续可见达3个多月了。2007年11月末,在风暴中检测到了闪电,而上面的影像是在2008年3月初拍摄。粗略地估计风暴有地球那么宽。行星科学家推测这个风暴位于土星云层深处。上面的影像是在比红光更红的、人眼无法看到的波段下拍摄的,结合了紫光和绿光显示了夸张的颜色。在影像右上方可以看到土星广阔的光环系统。仔细检查还能发现土星的小卫星-土卫十,就位于光环阴影下方。了解其它星球上的气候能帮助气候科学家们更好地理解我们地球上的气候。对我们太阳系内这颗巨大环状星球的观测将追踪风暴如何演变,以及它最终会持续多长时间。

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