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发帖数: 1994 | 1 Cassini Closes in on Saturn
Credit: Cassini Imaging Team, SSI, JPL, ESA, NASA
Explanation: Are they gone? They were not originally predicted to even be there. The mystery revolves around strange shadow-like spokes that appeared on Saturn's large B-ring, the large middle ring in the complex system of particles that orbits Saturn.
The spokes were discovered 23 years ago by the passing Voyager spacecraft and attributed to very fine dust of unknown origin. The missing spokes were noted in the above |
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