ニューヨーク・タイムズのインスタグラム(nytimes) - 8月26日 12時54分

Last week, @NASA’s #Cassini spacecraft captured this crescent view as it made its last flyby of Dione, the fourth largest of Saturn’s more than 60 moons. Cassini entered orbit around #Saturn 11 years ago. Now, it’s on its farewell tour. Beginning in October, the spacecraft will make three final flybys of Enceladus, a smaller moon that has jets of water vapor and ice shooting out of its south pole. But what’s most intriguing is that, beneath its outer shell of ice, Enceladus could have a six-mile-deep ocean, making it possibly one of the most promising places in the solar system to look for life. In the meantime, Dione has its own mysteries that planetary scientists hope to unravel...

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