关于这张图
NASA Cassini spacecraft captured this parting view showing the rough and icy crescent of Saturn moon Dione following the spacecraft last close flyby of the moon on Aug. 17, 2015. Cassini obtained a similar crescent view in 2005 (see PIA07745). The earlier view has an image scale about four times higher, but does not show the moon's full crescent as this view does. Five visible light (clear spectral filter), narrow-angle camera images were combined to create this mosaic view. The scene is an orthographic projection centered on terrain at 0.4 degrees north latitude, 30.6 degrees west longitude…
