When astronomers talk about the "habitable zone," they mean the shell around a star where the temperatures are right for liquid water.

当天文学家谈及“可居住区”时，他们指的是恒星以外温度适于液态水存在的空间层。

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Infrared images from the Spitzer Space Telescope (yellow, red, and green) expose a surrounding shell of dust and gas that's being lit up as the material streams through a nearby star cluster.

由斯皮策太空望远镜拍摄到的红外照片(黄色、红色、绿色部分)正好是这颗气体恒星穿过附近的星团时，所显露出的尘埃及被点燃气团的外部结构。

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How much of a premium are you willing to shell out for something as cool as a Star Trek Enterprise Pizza Cutter?

你愿意为像《星际迷航》的企业号比萨刀一样酷的玩意付多少钱？

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