SPACE

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Across
  1. 2. - Celestial object with a tail
  2. 4. - Celestial event involving alignment of bodies
  3. 6. - Space traveler
  4. 8. - Celestial body orbiting a star
  5. 9. - Celestial body that emits light
  6. 10. - Path of a celestial body
Down
  1. 1. - Huge system of stars
  2. 2. - Universe as a whole
  3. 3. - Interstellar cloud of dust and gas
  4. 5. - Earth's natural satellite
  5. 7. - Small rocky body orbiting the Sun