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卡西尼发现一土星新环

  During a rare observation last weekend, Cassini's cameras revealed a new ring at Saturn and other spectacular sights, including wispy fingers of icy material stretching out tens of thousands of kilometers from Enceladus and even an image of distant planet Earth.
  在上周少有的观测中,卡西尼的照相机显示出土星的一个新环和其他一些壮观景象,包括从土卫二伸展出的数万千米细指状冰物质以及回望地球的一张照片。

A new Ring
  On September 15, 2006, Cassini revealed a new diffuse ring at Saturn, coincident with the orbits of Janus and Epimetheus. This observation occurred during a solar occultation, where the Sun passed directly behind Saturn and left Cassini in Saturn's shadow with brilliantly backlit rings. Usually, an occultation lasts only about an hour, but this time it was an unusual 12-hour marathon.
  2006年9月15日,卡西尼号显示出土星的一个新环,其轨道与土卫十和土卫十一相符。此次观测是当太阳正从土星后面经过而卡西尼号则处在土星的阴影中时进行的,在背光中光环显得很明亮。通常这种情况只持续约1小时,但这一次是不寻常的12小时马拉松。

  The new ring is marked by a cross in the inset of the image just outside the overexposed main rings and interior to the G and E rings. The G ring has a sharp inner boundary; the E ring is extremely broad and arcs across the upper and lower portions of the scene. Credit: NASA / JPL / Space Science Institute
  新环用一个十字在图中标出,处在曝光过度的主环外G环和E环之内。G环有着清晰锐利的内边界;E环非常宽的弧线穿过场景中的上部和下部。(上图)

Cassini Captures a View of "Home"
  Cassini casts powerful eyes on our home planet, and captures the pale blue orb of our Earth -- and a faint suggestion of our Moon -- among the glories of the Saturn system. The Earth-Moon system is visible as a bright blue point on the right side of the image above center. Here, Cassini is looking down on the Atlantic Ocean and the western coast of north Africa. NASA / JPL / Space Science Institute
  卡西尼朝我们的故乡瞥了一眼,从壮丽的土星系统中捕捉到了我们这颗蓝白相间的地球——和我们的黯淡的月亮。地月系统看上去就像一个明亮的蓝点儿处在图片中心的右上方。此刻,卡西尼正俯视着大西洋和非洲南部的西海岸。
感谢:NASA / JPL / Space Science Institute

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