Space Crossword Puzzle

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Across
  1. 2. The curved path of a celestial object around another.
  2. 3. Relating to the Moon.
  3. 5. A small rocky or metallic body traveling through space.
  4. 8. A celestial body orbiting a star.
  5. 10. A bowl-shaped depression formed by an impact.
  6. 12. All of space and time and their contents.
Down
  1. 1. A planet that orbits a star outside our solar system.
  2. 4. The force that attracts objects towards each other.
  3. 6. A region of spacetime with such strong gravity that nothing can escape.
  4. 7. A person trained to travel in space.
  5. 9. An object that orbits a planet.
  6. 11. A vehicle propelled by a jet engine.