Mia Mahan

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Across
  1. 2. a structured grouping of billions of stars, gas, and dust
  2. 4. the slowing of the flow of time
  3. 5. discovers X-rays
  4. 8. These huge black holes form at the cores of galaxies
  5. 9. black hole forms when a supernova occurs
  6. 12. how physical size of black holes is measured
  7. 15. defines modern theory of black holes
  8. 17. described Gravity
  9. 18. an explosion caused by the collapse of the core of a massive star
  10. 20. the center of a black hole
Down
  1. 1. most powerful form of electromagnetic radiation
  2. 3. coined the term “black hole”
  3. 6. beyond which anything that crosses cannot escape
  4. 7. theoretical “tubes” in space-time
  5. 10. published the General Theory of Relativity
  6. 11. created when the largest stars collapse at the end of their lives
  7. 13. year the distance light travels in one year, approximately 9.46 trillion meters
  8. 14. material falling into the black hole collects into a 3 band of hot gas and dust
  9. 16. the attractive force between any two bodies that is the result of their masses
  10. 19. The quantity of matter that makes up an object