Stars

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Across
  1. 2. used in measuring the distance to nearby stars
  2. 4. state the least possible energy
  3. 6. levels each element has its own unique set of electrons
  4. 9. the distance to an imaginary star whose parallax is 1 second or arc
  5. 11. energy the energy required to remove it from the atom
  6. 14. spectra the spectrums of stars
  7. 15. longer wavelengths
  8. 16. atom radiates that energy in the form of a pellet of light
  9. 17. the analysis of spectra
Down
  1. 1. lines the strongest dark lines
  2. 3. smallest particle of a chemical element
  3. 5. atom which is positive
  4. 7. state when atom is unstable
  5. 8. velocity motion through space
  6. 10. spectrum positive identification of the chemical element that produced it
  7. 12. lines are produced when electrons jump higher energy levels
  8. 13. stars wavelengths shorter