OUT

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Across
  1. 2. / The galaxy that contains our solar system.
  2. 3. / The path one object takes around another in space.
  3. 6. / A celestial body of ice and dust with a glowing tail.
  4. 8. / The largest planet in our solar system.
  5. 10. / The star at the center of our solar system.
  6. 13. / First astronaut to walk on the moon.
  7. 14. / The smallest planet and closest to the Sun.
  8. 16. / The number of planets in the solar system.
Down
  1. 1. / The astronomer who used a telescope to observe planets.
  2. 4. / The farthest planet from the Sun in our solar system.
  3. 5. / The planet known for its prominent ring system.
  4. 7. / Known as the Red Planet.
  5. 9. / Once considered the ninth planet, now classified as a dwarf planet.
  6. 11. / A planet that rotates on its side.
  7. 12. / The second planet from the Sun, often called Earth's twin.
  8. 15. / The only planet known to support life.