Astronomy cross word

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Across
  1. 3. A person who travels to space
  2. 5. A ball of ice and dust that orbits the Sun
  3. 7. The largest planet in our solar system
  4. 8. The star at the center of our solar system
Down
  1. 1. Earth’s natural satellite that causes tides
  2. 2. A massive system of stars, like the Milky Way
  3. 4. The planet famous for its rings
  4. 6. The red planet, known as Earth’s neighbor