Astronomy Crossword Puzzle

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Across
  1. 1. , A massive system of stars, stellar remnants, interstellar gas, dust, and dark matter bound together by gravity.
  2. 3. , The branch of astronomy concerned with the physical nature of stars and other celestial bodies.
  3. 5. , Energy emitted in the form of waves or particles from celestial objects.
  4. 7. , The universe seen as a well-ordered whole.
  5. 10. , All existing matter and space considered as a whole.
  6. 11. , Unit of length used in astronomical measurements.
  7. 12. , The curved path of a celestial object around a star or planet.
  8. 13. , A small rocky body that orbits the Sun.
  9. 16. , U.S. space agency known for various space missions.
  10. 17. , The study of the origin and development of the universe.
  11. 18. , A massive, luminous celestial body.
  12. 19. , A planet located outside our solar system.
  13. 22. , A space telescope launched in 1990.
  14. 23. , Instrument used to magnify distant objects in space.
  15. 24. , A streak of light produced by a meteoroid entering Earth’s atmosphere.
Down
  1. 2. , Relating to the Moon.
  2. 4. , A type of telescope that detects radio waves from space.
  3. 6. , A facility equipped for observing astronomical events.
  4. 8. , A unit of distance sometimes used in astronomical measurements.
  5. 9. , Explosive deaths of stars that outshine entire galaxies.
  6. 13. , A person trained to travel in space.
  7. 14. , Relating to the Sun.
  8. 15. , A vehicle designed for exploring the surface of a planet or moon.
  9. 20. , A celestial body that orbits a star.
  10. 21. , Instrument used to observe distant celestial objects.