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Text File  |  1995-11-04  |  207b  |  6 lines
  1. heavy elements: 98 percent of the
  2. matter in our universe is either
  3. hydrogen or helium. Astronomers
  4. refer to all the remaining elements,
  5. including carbon, oxygen, nitrogen,
  6. etc., as ΓÇ£heavy elements.ΓÇ¥