Black Holes, Neutron Stars, Pulsars

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Across
  1. 5. Bright,irregular flashes of gamma rays
  2. 8. A rotating disk of matter formed around a massive body
  3. 10. 100,000 to billions of solar masses. Found in the center of galaxies
  4. 11. difference in elapsed time as measured by two clocks
  5. 12. a powerful explosion of a star
  6. 13. The size of a Neutron Star
  7. 15. A type of neutron star with an extremely powerful magnetic field
Down
  1. 1. Forms when a massive star runs out of fuel and collapses
  2. 2. Violent eruptions thousands of times more luminous than our sun and lasting seconds.
  3. 3. the boundary where the velocity needed to escape exceeds the speed of light
  4. 4. ripples in the fabric of space time
  5. 6. the point where density and gravity become infinite
  6. 7. A system of two stars that are bound to each other
  7. 9. 3 to dozens of times greater than the Suns mass
  8. 14. A neutron star that emits heavy radiation as it spins very fast