科技新闻 Weird wave found in Venus’ wind-whipped atmosphere-教材资讯
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科技新闻 Weird wave found in Venus’ wind-whipped atmosphere

2017-01-18 18:05:20 本站 点击数:730

科技新闻 Weird wave found in Venus’ wind-whipped atmosphere

太阳系的众多行星里,个顶个地古怪,金星最亮,240多地球日才有一次日出日落,整个星体布满神秘,在其浓密的大气上,一个缓慢移动的大气结构,再次为维纳斯之星添了一缕神秘。今天的趣味科学英语新闻,带你一探究竟。

With scorching temperatures and a mind-numbingly slow rotation (one Venus day lasts 243 Earth days), Venus was already a contender for weirdest planet in the solar system. Now add a giant arc-shaped structure to its list of oddities. The mysterious 10,000-kilometer-long structure was so big that it appeared to stretch between the planet’s poles. And it didn’t budge, even as winds in the planet’s upper atmosphere whipped along at a brisk 100 meters per second.

The C-shaped structure, which lasted at least four Earth days, could be a gravity wave, a large disturbance in the flow of a fluid or air, scientists say. It may have formed on Venus when winds in the planet’s lower atmosphere slammed into a mountain range and were pushed into the upper atmosphere, where it got stuck, a team of Japanese researchers report January 16 in Nature Geoscience.

Captured in images taken by JAXA’s Akatsuki spacecraft in December 2015, the structure could be the largest stationary gravity wave ever observed in the solar system. If it did shift from the lower to upper atmosphere, there may be more going on near the surface of the planet than scientists previously thought.

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原文连接:http://www.eshareedu.com/News/detail/id/338.html


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