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