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Across 1. = Physical Separation/2pi (distance) (Angular resolution equation) 2. Equation used to estimate the # of detectable ET civilizations 4. H, He, C, O, Ne, Mg, Si, S, Ca, Fe 6. Formed after a supernova of high mass 8. Han Solo's co-pilot 11. Spectra with certain wavelengths against a black background 13. White dwarf comes after the death of a ___ mass star 14. V Class Stars 15. Proton-proton chain 17. Search for Extraterrestrial Intelligence 22. Formed after a supernova of low mass 24. The brightest star in the night time sky 25. I Class Stars 26. Photosphere = ____ layer from the outside of a star

Down 3. Rainbow interrupted by loss of certain wavelengths 4. Explosion of a High Mass Star 5. A desert planet in a binary star system, the birthplace of Dark Vader 7. A large slug-like alien who is a ruthless gangster that held a bounty on Han Solo 9. Chromosphere = ____ layer from the outside of a star 10. A powerful Jedi-master from the Dagobah System 12. Law that states the total energy in a black body diagram is proportional to the temperature 16. A very beloved astromech droid 18. III Class Stars 19. Law that states the wavelength distribution is the same shape at every temperature 20. Convection Zone = ____ layer from the outside of a star 21. Corona = ____ layer from the outside of a star 23. Radiation Zone = _____ layer from the outside of the star