• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Air and Space >Saturn's Deep, Dark Secret What will we find on the ringed planet's largest moon
【24h】

Saturn's Deep, Dark Secret What will we find on the ringed planet's largest moon

机译：土星的深层，黑暗的秘密我们在环状地球最大的月亮上会发现什么

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

But spare a thought for the European Space Agency's Huygens planetary probe. After a seven-year cruise through space, the 700-pound disk, stuffed with electronic instruments, will spend as little as three minutes on the surface of Titan, the largest moon of Saturn. Then it will either sink beneath a burbling methane ocean or be abandoned in frozen Titanic wastes forevermore. And that's if everything goes well. Yet Huygens and its ground controllers in the German suburb of Darmstadt will in those three minutes see what no one has seen before. Titan, which is larger than Mercury and almost half the size of Earth, is surrounded by a dense gaseous atmosphere that has kept its surface hidden- from the Voyager probes, which flew by in 1980 and '81; from the Hubble Space Telescope, which measured the moon's surface reflectivity in 1994; and from the cloud-penetrating radar of the Areci-bo Observatory in Puerto Rico, which in 2001 and 2002 detected glints from Titan's radar-reflective areas. To know the surface of Titan, scientists must send an observer to descend beneath the atmosphere. ESA's Huygenauts don't even know if their vessel will land on a hard surface or liquid; they figure the chances for either at 50-50.
机译：但是，对于欧洲宇航局的惠更斯行星探测器，请多加考虑。经过七年的太空航行后，装有电子仪器的重达700磅的磁盘将在土星最大的卫星泰坦的表面上停留仅三分钟。然后它要么沉入汹涌的甲烷海之下，要么永远遗弃在冰冻的泰坦尼克号废物中。那就是一切进展顺利。然而，惠更斯及其在德国郊区达姆施塔特（Darmstadt）的地面控制人员将在这三分钟内看到任何人从未见过的东西。泰坦（Titan）比水星大，几乎是地球的一半，周围被稠密的气态大气所包围，使它的表面不被旅行者（Voyager）探测器遮挡，后者于1980年和81年飞行；来自哈勃太空望远镜，该望远镜于1994年测量了月球的表面反射率。以及波多黎各阿雷西博天文台的穿透云层的雷达，该雷达在2001年和2002年检测到土卫六的雷达反射区域出现了闪光。要知道土卫六的表面，科学家必须派一个观察员向下进入大气层。 ESA的惠更斯人甚至不知道他们的船只是否会降落在坚硬的表面或液体上。他们认为机会在50-50之间。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号