環世界 Planetary Rings
Now, we know that Jupiter, Saturn, Uranus and Neptune have known rings, but Saturn's Rings are still the most prominent and most knowledgeable for the public. From the early observations of Saturn to the recent space ages closeup flyby, our knowledge of planetary rings is getting improved. Especially, in Saturnian system, some satellites lived within the rings and played a celestial dance with the ringlets. These rings are composed of tiny pieces of particles sized from smoke to bus size. Why do the planets have ring? What are the views of these rings? What are the differences between the rings of planets? In this lecture, we will discuss the recent discoveries of the planetary rings.
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