Astronomy Crossword

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Across
  1. 3. is the speed (velocity) needed to escape (pull away from) the gravitational pull of an object.
  2. 4. a supermassive black hole feeding on gas at the center of a distant galaxy.
  3. 7. A neutron star that spins hundreds of times per second
  4. 8. the spherical distance surrounding a black hole out of which nothing can escape
  5. 11. a region of space having a gravitational field so intense that no matter or radiation can escape.
  6. 13. an explosion of a star that causes the star to shine a million times brighter than before
  7. 14. emit energy in violent eruptions
Down
  1. 1. are bright, irregular flashes of gamma rays lasting for a few seconds.
  2. 2. Matter is vertically stretched and horizontally squeezed
  3. 5. the point at the center of a black hole
  4. 6. an extremely small and extremely dense leftover collapsed core of a star.
  5. 9. a spiral of gas that can surround a black hole
  6. 10. A compact neutron star that is emitting radio waves in rapid pulses.
  7. 11. a system of two stars that are gravitationally bound to and in orbit around each other.
  8. 12. the shrinking of a star caused by the pull of its own gravity