black holes

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Across
  1. 5. force that attracts something to the center of the Earth
  2. 6. Center of a black hole
  3. 7. having a mass greater than a million suns combined
  4. 8. a very dense star made up of neutrons
  5. 9. Spiral of gas that surronds a black hole
  6. 12. The speed an object must go to escape the gravitational pull of another object
  7. 13. if you want to escape a blackhole, you must travel faster than the....
  8. 14. Huge space that contains all the matter in existence
Down
  1. 1. the distance that surronds a blackhole where nothing can escape
  2. 2. Two objects that orbit around each other
  3. 3. A supermassive black hole feeding on gas from nearby galaxies
  4. 4. a unit of distance of about 3.26 light years
  5. 5. bright flashes of gamma rays lasting for just a few seconds
  6. 10. An explosion of a star
  7. 11. the shrinking of a star because of its own gravity pull