The best possible explanation seemed to be that something physical-a ring of debris around rhea-was blocking the ions and electrons from reaching Cassini. (see "Saturn Moon May Have rings-a First.")

最有可能的解释像是某些物质——围绕土卫五的碎片环——正阻碍离子和电子到达卡西尼。(参见《土星的卫星也许有光环——第一个》。)

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Its particles are diffuse and may even extend beyond the bulk of the ring material all the way in to Saturn and all the way out to interplanetary space.

光环微粒是如此的弥散以致于它们从土星一直延伸到行星间空间。

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This diagram illustrates the extent of the largest ring around Saturn, discovered by NASA's Spitzer Space Telescope.

本插图示意了由斯皮策空间望远镜发现的土星大光环的范围。

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The more easily visible outlier in Saturn's famous bands of ice and dust is its E-ring, which encompasses the orbit of the moon Enceladus.

BBC: New ring detected around Saturn