Astronomy Words

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Across
  1. 2. A meteoroid that has entered a planet's atmosphere
  2. 4. A collection of solar systems
  3. 6. A small body of rock which does not orbit
  4. 10. A collection of planets around a star
  5. 12. The study of the positions of celestial bodies to predict the future on earth
  6. 13. All matter and space as a whole
  7. 14. To go around
  8. 15. A small rock orbiting a star
  9. 16. A large body of rock or gas which orbits a star
Down
  1. 1. Orbits a star in an oval-shape; made of ice or something similar
  2. 2. A body of rock which orbits a planet
  3. 3. To spin
  4. 5. A collection of stars grouped together to make a picture
  5. 6. The fragments of rock left over when a meteor strikes a planet
  6. 7. The gas that surrounds a planet
  7. 8. The branch of science which deals with celestial objects, space and the physical universe as a whole.
  8. 9. A burning ball of hydrogen and helium
  9. 11. Our galaxy