Cassini’s view of Saturn on April 7, 2015 四月 10, 2015 由 观察空间 分享此: Cassini captured this image of Saturn on April 7, 2015 利用其CB2和CL2过滤器. That small bright speck on the left might be Dione, 土星的卫星之一. 信用: NASA / JPL / SSI / @ ObservingSpace View on Flickr Follow on Twitter 分享此: