Science-ing it up!

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Across
  1. 5. Not a pound, not stone, not a gram
  2. 7. What some cool people do
  3. 10. Light
  4. 12. Carbon and Hydrogen
  5. 13. Nick and Schmidt's party...
  6. 14. Sheldon's favourite theory
Down
  1. 1. Always attractive
  2. 2. Floating
  3. 3. Shiny
  4. 4. Neil DeGrasse Tyson kicked you out of the club (even though he dies it :P)
  5. 6. Why the sun shines
  6. 8. Marie Curie and the reason why glowing in the dark isn't always a good thing
  7. 9. Old plumbers favourite
  8. 11. Hunter in the skies
  9. 15. Not as cool as Molybdenum Man