The turquoise lagoon of French Polynesia's Mataiva atoll stands out against the dark blue of the surrounding Pacific Ocean in an image taken by an astronaut on August 13.

这个绿松色的礁湖，位于法国波利尼西亚群岛的萨摩亚环礁，于周围深蓝色的太平洋形成了强烈的对比，这幅图片是8月13号由航天员拍摄。

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Situated roughly equidistant from Hawaii, Japan and Australia, the atoll encircles the world's largest lagoon.

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