You are here

Saturn's orbital patterns shape Titan's ancient dunes

意得辑专家视点 | 2014年12月9日 | 2,389 浏览次数
Saturn's orbital patterns shape Titan's ancient dunes

Giant sand dunes make up the surface of Titan, Saturn’s moon, and these dunes made of hydrocarbon particles may have existed for thousands of years. Radar images of the dunes by NASA’s Cassini spacecraft suggest that orbital variations of Saturn affect the shape of the dunes, which in turn reflect the resulting changes in weather patterns. According to Ryan Ewing, a geologist at Texas A&M University in College Station, who led the study, it may take as long as 3,000 Saturn years (or 90,000 Earth years) for a single dune to change direction. His team noticed ‘star’ shaped dunes that might have formed due to prevailing winds blowing from several directions. Interestingly, the smaller star-shaped dunes are oriented in a different direction from the larger, linear ones. The team calculated that it would have taken several thousand years for the winds to change direction and start forming the star-shaped dunes. Ewing now plans to study the effect of shifting orbital patterns of Saturn on Titan’s winds.

Read more in Nature.  

Image: Wikimedia Commons

重新发布

喜欢这篇文章的内容吗?欢迎重复发表!
《意得辑专家视点》深信知识需要开放给所有大众并传播,因此我们鼓励读者重复发表我们的内容,重复发表形式可为在线或印刷。我们采用知识共享(Creative Commons license),只要您遵守以下事项,即可免费重复发表我们的内容:
  • 作者信息:请尊重我们的作者,他们花费了时间精力为您撰写这些有价值的内容,重复发表时加注作者信息。
  • 意得辑专家视点:必须注明文章出自《意得辑专家视点》。
  • 表达您的情意:您可以加句“前往《意得辑专家视点》阅读全文”之类的话,啊,还有,别忘了加上文章链接。
  • 重复使用图片:要使用某些文章的图片必须事先取得许可,并加注图片原始出处。
  • 镶嵌代码:要重复使用这篇文章最简单的方式就是将下面的代码复制贴上您的页面!

 

请将上方代码直接复制贴上到您的网站,即可重新发布