Leavitt and Stars

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Across
  1. 2. What was her job at Harvard College Observatory?
  2. 3. What is the closest star to earth?
  3. 6. What word do we use to describe the bending of light as a star races through our atmosphere and bounces and bumps through the different layers?
  4. 7. What are stars which brighten and dim periodically?
  5. 9. What law describes a relationship linking the luminosity of pulsating variable stars with their pulsation period?
  6. 10. What is a huge celestial body made mostly of hydrogen and helium?
  7. 11. What are large groupings of stars?
Down
  1. 1. What is a measure of the total amount of energy radiated by a star or other celestial object per second
  2. 4. Where was Henrietta Leavitt born?
  3. 5. What item on the moon is named after Leavitt to honor deaf men and women who have worked as astronomers?
  4. 8. What physical ailment did Leavitt suffer from for most of her adult life?