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| physical phenomena > event > era > Big Bang era > hadron era | 
| hadron era comparison table | ||||||||
| Subject | has start time | has definition | is preceded by | has density | has synonym | 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 : 
  | world point | era | ||||
| hadron era | 10-43 s after Big Bang | The Big Bang era during which quantum and general-relativistic effects are expected to modify each other in an unknown way. | Planck era | ρ = 1093 g cm-3 | hadron barrier | lepton era | Big Bang era | 10-5 s | 
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