Saturn's ring

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Across
  1. 3. The scientist who first observed Saturn’s rings in 1610
  2. 4. The smallest named moon of Saturn’s rings
  3. 5. The planet with the most prominent ring system
  4. 7. A moon with a UFO-like shape orbiting Saturn
Down
  1. 1. The astronomer who proposed that Saturn was surrounded by a ring
  2. 2. The total number of main rings around Saturn
  3. 4. The icy and rocky objects that make up Saturn’s rings
  4. 6. The spacecraft that captured detailed images of Saturn’s rings