Big Bang Theory

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Across
  1. 2. is a theory of the exponential expansion of space in the early universe
  2. 3. refers to a place in the universe where our laws of physics simply break down
  3. 5. gaps between constituent particles
  4. 8. is a separation of opposite electrical charges
  5. 10. measure of hotness or coldness expressed in terms of any of several arbitrary
  6. 12. is a boundless, three-dimensional extent in which objects and events occur and have relative position and direction
  7. 13. base unit of thermodynamic temperature measurement in the International System of Units
Down
  1. 1. is a branch of astronomy involving the science of the universe's origin.
  2. 4. molecules are formed by atoms consisting of antiprotons, antineutrons, and positrons. Stable antimatter does not appear to exist in our universe.
  3. 6. Any of a class of variable stars whose luminosity fluctuates with an extremely regular period
  4. 7. is a huge collection of gas, dust, and billions of stars and their solar systems.
  5. 9. is the difference in the direction of a celestial object as seen by an observer from two widely separated points
  6. 11. the wavelength of the light is stretched, so the light is seen as 'shifted' towards the red part of the spectrum