black hole

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Across
  1. 3. beams of ionised matter accelerated close to the speed of light.
  2. 6. A neutron star that spins hundreds of times per second.
  3. 8. powerful and luminous explosion of a star
  4. 12. the object left behind from a high mass supernova that is extremely dense
  5. 13. a hole
  6. 14. the single point of mass of a collapsed and condensed
  7. 16. The surface of a black hole
Down
  1. 1. neutron star with a very strong magnetic field
  2. 2. disc of superheated gas circling a black hole
  3. 4. bright irregular flashes of gamma rays
  4. 5. Matter is vertically stretched and horizontally squeezed-
  5. 7. the speed an object needs to escape gravitational pull
  6. 9. spinning neutron star
  7. 10. emits radiation in violent burst
  8. 11. the distance of the event horizon from the center of a black hole.
  9. 15. two stars that are gravitationally bound to and in orbit around each other