$Money's First Puzzle

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Across
  1. 2. Demoted from planethood
  2. 4. what ancient seafarers had to study
  3. 6. with saturn, part of the Great Conjunction
Down
  1. 1. In the middle of our solar system
  2. 2. 2020 meteor shower
  3. 3. The biggest moon in the solar system
  4. 5. Keeps his hunter pants up with a belt