Cassini discovered Saturn's moon Iapetus. To him, it was a point of light. Here it is up close: https://t.co/cEfCAffAz6 #GiftsForCassini http://pic.twitter.com/JkLyKxpbcr
— CassiniSaturn (@CassiniSaturn) June 8, 2017
via Twitter https://twitter.com/CassiniSaturn
June 08, 2017 at 10:23PM
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