Astronomy crossword

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Across
  1. 1. has a black hole in the center
  2. 6. visible part of the sun
  3. 7. to circle a more massive object
  4. 9. the spin of an object
  5. 10. high tides are lower and low tides are higher
Down
  1. 2. unit of measurement(how far light will travel through space in one year)
  2. 3. intense explosions near sunspots
  3. 4. has a star and planets revolve around it
  4. 5. high tides are higher low tides are lower
  5. 8. revolve around planets