Astronomy

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Across
  1. 3. Way (Our galaxy)
  2. 6. (Explosion of a massive star)
  3. 10. (Largest planet in the solar system)
  4. 12. (Interstellar cloud of gas and dust)
  5. 14. (Ringed planet)
  6. 15. (Luminous celestial body)
  7. 16. (Person who travels in space)
  8. 17. (Prominent constellation)
  9. 18. (Alignment of celestial bodies blocking light)
Down
  1. 1. (Vast system of stars)
  2. 2. (Instrument for observing distant objects)
  3. 3. (Earth's natural satellite)
  4. 4. (Icy celestial object with a tail)
  5. 5. (Small rocky object burning up in the atmosphere)
  6. 7. (Second planet from the Sun)
  7. 8. (Red planet)
  8. 9. (Dwarf planet)
  9. 11. (Large celestial body orbiting a star)
  10. 13. Hole (Region of spacetime with strong gravitational pull)
  11. 15. (Star at the center of the solar system)