Restricted Cat - Side A

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Across
  1. 6. concept violated by instantaneous action-at-a-distance
  2. 10. layer of the sun from which light is emitted into space
  3. 12. type of particle including electron and muon
  4. 13. missions to the outer planets (1977-1989)
  5. 14. group of stars
  6. 15. used to determine chemical composition of stars
  7. 20. two words; imaginary hollow sphere around the earth
  8. 22. the name of our planet
  9. 23. two words; lowest limit of temperature
  10. 26. two words; thought to accelerate universe expansion
  11. 27. discovered first cepheid variable in 1923
  12. 29. aberration. disadvantage of refractors
  13. 30. a principle central to general relativity
  14. 31. a direct method for finding distance to a star
  15. 33. lets us calculate how fast an object is receding
  16. 34. smallest planet
Down
  1. 1. type of star cluster
  2. 2. Dutch inventor of the telescope
  3. 3. a moon of mars
  4. 4. another name for prominences
  5. 5. two words; venus has clouds of this
  6. 6. two words; constellation between bootes and hercules, asterism of seven stars
  7. 7. the arab astronomer al-Sufi revised this person's star catalogue
  8. 8. part of the sun’s atmosphere
  9. 9. red planet
  10. 11. splits light into a spectrum
  11. 16. the U in GUTs; string theory is one of these
  12. 17. Europa’s orbit can be described as this
  13. 18. two words; local cluster of galaxies containing the milky way
  14. 19. largest crater on the moon
  15. 21. proposed many-worlds interpretation
  16. 24. discovered moons of jupiter
  17. 25. phenomenon; wobble of earth’s axis
  18. 28. a book written by isaac newton
  19. 32. two words; type of star orbited by gliese 581c