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World Science Scholars
2.2 Exploring Cosmology and the Cosmic Microwave Background
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Cosmologydrop-down

  • Cosmology is a historical science that uses “fossils” to understand the origins of the universe.
  • The universe is about 14 billion years old. It takes the universe 14 million years to expand by a factor of 2.

Cosmic Microwave Backgrounddrop-down

  • “Fossil” light leftover from the big bang was discovered in 1965.
  • The temperature of the cosmic microwave background varies spatially.
  • The light we are observing was generated when hydrogen atoms formed, 400,000 years after the big bang.


 
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