The Study of the Universe

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Across
  1. 2. The study of space and everything beyond earth.
  2. 6. A constellation known as the queen.
  3. 8. Rising and falling of the sea.
  4. 9. A medium sized yellow dwarf star in our solar system.
  5. 10. A natural satellite of the Earth.
  6. 11. A chunk of ice, dust or rock that orbits the sun.
  7. 12. Gasses and charged particles are expelled above a sunspot.
  8. 14. A theory of the creation of the universe.
  9. 15. A large celestial object that circles a star.
  10. 17. Obscuring of light from one celestial body passing in front of another.
  11. 18. The layer of gasses surrounding the Earth.
  12. 19. A celestial object that orbits a planet.
Down
  1. 1. A group of stars held together by gravity.
  2. 3. The path an object follows as it circles another.
  3. 4. A large number of meteors falling in the sky and burning up.
  4. 5. The planet on which we live.
  5. 7. A dark spot on the sun's surface.
  6. 13. The distance a light ray travels in 1 year.
  7. 16. Also known as the North Star.