Astronomy

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Across
  1. 3. The center layer of the sun.
  2. 4. The largest type of star in the universe.
  3. 6. The lines that allow us to see what elements are in stars.
  4. 7. Color of the hottest type of stars.
  5. 8. What we use to observe the universe.
Down
  1. 1. Type of telescope that uses lenses and mirrors.
  2. 2. The outermost layer of the sun.
  3. 4. Most stars in the universe are in the main ________.
  4. 5. Type of telescope that only uses mirrors.