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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 era	relative to the Big Bang	A theoretical era postulated to have occurred after the Big Bang. They are in order : Planck era hadron era inflation era lepton era nucleosynthetic era radiation era matter era			era
Planck era	0 s after Big Bang	The 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 Bang	hadron era, inflation era	Big Bang era	10-43 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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