A Brief History of Time

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Across
  1. 5. The idea that the Universe is identical whichever direction we look in
  2. 7. the redshift or blueshift of the light expelled of an object moving towards or away from us
  3. 8. made the theory that the universe can expand, also made models to show it
  4. 11. The principle that uses the fact that we can make observations as a base to describe things cosmologically
  5. 13. boundary of a black hole
  6. 14. branch of physics that describes the smallest particles and how they work, contradicts the Theory of Relativity
  7. 18. regions where gravity is so strong that nothing can escape it
  8. 20. the electromagnetic and weak nuclear force acting as one at high temperatures
  9. 21. number of flavors of quarks
  10. 23. subatomic particles that make up hadrons (protons and neutrons)
  11. 24. the force that charged molecules exert
  12. 26. theory attempting to explain the combined forces
  13. 27. force responsible for radioactivity
  14. 29. one of the first people to think the Earth is round
  15. 30. the point where something takes an infinite value
Down
  1. 1. E=mc^2
  2. 2. Found that not everything has to orbit the Earth, also found 4 of Jupiter’s moons
  3. 3. ________ duality is the property of expressing properties of both waves and particles
  4. 4. the principle that we can’t know both the speed and location of an object with complete accuracy
  5. 6. Albert Einstein’s theory that combined the ideas of gravity, space, and time
  6. 9. Geocentric model of the Solar System
  7. 10. the force that holds neutrons, protons, and atomic nuclei together
  8. 12. Discovered that stars could collapse under their own gravity to reach extremely high densities
  9. 15. narrator of the book, also did groundbreaking work with black holes
  10. 16. shows us what a particle looks like from different directions
  11. 17. The idea that the Universe is identical where ever we are
  12. 19. Laws of Motion
  13. 22. the force that two bodies put on each other as a product of their masses
  14. 25. generally accepted theory of the beginning of the universe
  15. 28. the measure of disorder in a system