NASAのインスタグラム(nasa) - 3月15日 03時14分

Tilted Terminator: When viewed with north pointing up, as in this image, the day-night boundary line (or terminator) cuts diagonally across Enceladus, with Saturn approaching its northern summer solstice. The lit portion on all of Saturn's large, icy moons, including Enceladus (313 miles or 504 kilometers across) and Saturn itself, is now centered on their northern hemispheres. This change of season, coupled with a new spacecraft trajectory, has progressively revealed new terrains compared to when Cassini arrived in 2004, when the southern hemisphere was more illuminated. This view captured by NASA's Cassini Mission to Saturnshows wrinkled plains that are remarkably youthful in appearance, being generally free of large impact craters.
Credit: NASA/JPL-Caltech/Space Science Institute

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