Module 16 - Astrophysics

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Across
  1. 3. The layer of the sun closest to the surface.
  2. 6. A brief eruption of intense energy from the sun's photosphere
  3. 9. Our galaxy's group of localish galaxies
  4. 10. A measurement of distance used by astronomers
  5. 11. A class of stars that vary at constant rates.
  6. 13. The nearest star to the earth.
  7. 14. The brightness of a star corrected for distance
  8. 15. The layer of the sun that we usually see.
  9. 17. A collection of stars bound by gravitational force and orbiting a common center
  10. 18. Our galaxy
Down
  1. 1. The amount of a substance necessary to sustain a chain reaction in nuclear fission
  2. 2. The way stars generate energy.
  3. 4. Our galaxy's supercluster (beware - referred to in text as a cluster)
  4. 5. A cloud of gas, usually a supernova remnant
  5. 7. An even larger supercluster that the other supercluster is itself part of [Beware: not in text]
  6. 8. The brightness of a star as seen in the sky
  7. 12. The layer of the sun closest to the core.
  8. 16. The apparent jump in position when an object is viewed from two different perspectives (like switching from one eye to the other)