Solomon's Puzzle

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Across
  1. 2. Fireball, An alternative term for the radiation era in the Big Bang theory, during which the Universe was hot and dense and was dominated by the effects of radiation.
  2. 3. a theory of exponential expansion of space in the early universe.
  3. 6. Shift, change in observed wavelength, or frequency
  4. 7. the interaction of electric currents or fields and magnetic fields.
  5. 8. Density, the average density of matter required for the Universe to just halt its expansion
  6. 10. the science of the origin and development of the universe
  7. 14. Forces, gravity, electromagnetism, and the strong and weak nuclear forces
  8. 15. Hole, a region of space having a gravitational field so intense that no matter or radiation can escape.
Down
  1. 1. a unit of astronomical distance equivalent to the distance that light travels in one year,
  2. 4. degree of hotness or coldness measured by a thermometer with a numerical scale.
  3. 5. the Standard International ( SI ) unit of thermodynamic temperature.
  4. 9. stars which brigthen and dim periodically
  5. 11. Era, Moving to the next era
  6. 12. is a huge collection of gas, dust, and billions of stars and their solar systems, all held together by gravity.
  7. 13. Matter, is a hypothetical form of matter thought to account for approximately 85% of the matter in the universe.