The Big Bang :)

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Across
  1. 2. First epoch and started as a singular hot and dense point (2 words no space)
  2. 4. Massive object formed in space that emits a lot of energy and contains of a black hole and an accretion disk
  3. 9. the process that was halted only 20 minutes after the Big Bang began
  4. 10. Process of light elements formation
  5. 13. In the Photon Epoch, the universe was filled with what?
  6. 14. What remains of the very first light that traveled through the universe (3 letter abbreviation)
  7. 16. Single hot and dense point at the beginning of the Big Bang
  8. 17. Atomic clouds of hydrogen and helium form in the... (2 Words)
  9. 19. Current most plausible theory regarding the formation of the universe (2 words don't include "theory")
Down
  1. 1. The fundamental force not listed here: weak nuclear force, strong nuclear force and gravity
  2. 3. Believed the universe stemmed from a single primeval atom
  3. 5. Closest planet to us that is outside the solar system (2 words and a b at the end no space)
  4. 6. Subatomic Particles began to form in this epoch (2 words don't include "epoch")
  5. 7. most common type of lepton
  6. 8. most common type of antilepton
  7. 11. The current epoch we are in (2 words)
  8. 12. He proposed the theory of General Relativity
  9. 13. AKA "Radiation Domination" (2 words)
  10. 15. Fundamental particle that makes up all hadrons
  11. 18. Quarks begin to combine, forming hadrons (2 words)