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Spotting these rings from a backyard telescope is a treat.
从后院的望远镜观察这些土星环是一种不错的选择。
In an instant, they can all but disappear when Saturn tilts toward the sun.
在一瞬间, 当土星朝太阳倾斜他们会全部消失。
The overwhelming thing that a US space tourist would be struck by is how incredibly thin they are.
令人震惊的是美国的太空游客们也将会因其极为稀薄而受困。
They are no thicker than about one or two stories in a modern day building.
他们和当代建筑的一层或者两层相比不是很厚。
Interested in seeing for yourself? Strap in, space travelers, it's quite a ride.
为看到自己感兴趣吗?系好安全带，太空旅行者们,这是一次非常快的旅程。
After seven years and a billion miles of space, the Cassini-Huygens spacecraft faces its greatest challenge on June 30th, 2004.
经过七年和十亿英里的太空旅程,在2004年6月30日，卡西尼·惠根斯航天器面临最大的挑战。
注：听力文本来源于普特
