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Text File  |  1995-11-04  |  356b  |  10 lines
  1. emission lines: The distinct pattern
  2. of electromagnetic emissions, seen as
  3. bright lines, from any light-emitting
  4. object. Since each element has a
  5. characteristic pattern of emission
  6. lines, astronomers use the
  7. wavelength and other features of the
  8. emission lines from a celestial object
  9. to help determine its composition
  10. and physical characteristics.