Aster/Astro/Stella root

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Across
  1. 2. arranged in a radiating pattern like that of a star
  2. 6. a star shaped mark used in printing
  3. 8. an eroded remnant of a large crater made by the impact of a meteorite or comet
  4. 10. an "ill-starred" event
  5. 11. a building with a dome to view the stars
  6. 13. a disaster
  7. 15. occurring or situated between stars
Down
  1. 1. an instrument used to measure the altitude of celestial objects
  2. 3. a rock in space that looks that looks like a star when seen from Earth
  3. 4. a star shaped flower
  4. 5. a person who travels in space
  5. 7. a very large amount;as many as the stars in the sky
  6. 9. a group of stars that form a picture in the sky
  7. 12. the study of stars,planets and their movements
  8. 14. a science which studies life on earth and in space