Black Holes

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Across
  1. 2. the surface of a black hole
  2. 4. the amount of matter a object contains
  3. 6. massive star that runs out of fuel and collapses
  4. 9. "Unicorn" is the _____ blck hole to earth being 1,000 light years away
  5. 11. causes a supernova
Down
  1. 1. 2 stars with the same gravity
  2. 3. pulls so much that light cant escape
  3. 5. enter of a black hole
  4. 7. the mass of the sun
  5. 8. used to help detect black holes
  6. 10. how much a object takes up