$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 galaxy
  2. 2. 2020 meteor shower
  3. 3. The 2nd biggest moon in the solar system
  4. 5. Keeps his hunter pants up with a belt