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Planck era comparison table
Subject has start time has definition is preceded by is followed by is a kind of has duration
Big Bang erarelative to the Big BangA theoretical era postulated to have occurred after the Big Bang. They are in order :
  1. Planck era
  2. hadron era
  3. inflation era
  4. lepton era
  5. nucleosynthetic era
  6. radiation era
  7. matter era
  era 
Planck era0 s after Big BangThe Big Bang era, prior to which Einstein's theory of gravitation breaks down and a quantized theory of gravity is needed. Density was so high that gravitational force acted as strongly as the other fundamental forces on the sub-atomic scale.Big Banghadron era, inflation eraBig Bang era10-43 s or the time at which the size of the universe was roughly the Planck length (the time it takes light to travel the Planck length; G h bar / c5)1/2 where G is Newton's constant of gravitation, h bar is Planck's constant, and c is the speed of light

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