God's Great Universe

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Across
  1. 2. Patches of gas on the sun's surface that are cooler than the rest of the sun.
  2. 6. The study of the stars, planets and all other heavenly bodies.
  3. 7. An area containing no air or any other matter
  4. 9. A trip around the sun.
  5. 11. (of a star) The brightness of a star.
  6. 13. A star system containing from millions to billions of stars.
  7. 15. The sun's visible surface.
  8. 17. The force of attraction that exists between any two objects.
  9. 18. Fain spikes of hydrogen gas.
Down
  1. 1. A blanket of air that makes earth hospitable for living things.
  2. 3. The brightest star in the night sky.
  3. 4. any natural satellite of a planet.
  4. 5. The force that resists motion.
  5. 8. The brightest of all constellations.
  6. 10. A constellation named after a flying horse
  7. 12. he hottest region of the sun's atmosphere.
  8. 14. The actual explosion of a star.
  9. 16. A symmetrically shaped oval