Big Bang theory

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Across
  1. 2. what is the science of the origin and development of the universe in astronomy
  2. 3. what is the physical interaction among electric charges, magnetic moments, and the electromagnetic field
  3. 4. a region of spacetime where gravity is so strong that nothing can escape
  4. 5. what is the displacement of the spectrum to shorter wavelengths in the light
  5. 7. what is the twin of almost all the subatomic particles
  6. 9. what is a theory of exponential expansion of space in the early universe
  7. 13. instruments that measure electromagnetic radiation, from ultraviolet to infrared, including the visible spectrum
  8. 15. what do scientists use to explain the way the universe began
  9. 16. the SI base unit of thermodynamic temperature
Down
  1. 1. the cooled remnant of the first light that could ever travel freely throughout the Universe
  2. 6. a change in observed wavelength, or frequency
  3. 8. the study of the relations between heat, work, temperature, and energy
  4. 10. what is complete empty space
  5. 11. physical quantity that expresses quantitatively the perceptions of hotness and coldness
  6. 12. the distance light travels in a year
  7. 14. change, or the interval over which change occurs