Question

Explain hadronic era, leptonic era,radiation era and stellar era

Answer 1

Explanation:

As per my knowledge goes, the need and necessity is a similar condition where the difference between the two lies on the priority. A need is an absolute craving of man to possess while the necessity is also a craving without which man manages to survive.

Answer 2

Explanation:

The Degenerate Era is defined as "15 < n < 39". This is the era of brown dwarfs, white dwarfs, neutron stars and black holes. ... As this era continues, the authors hypothesize that protons will begin to decay (violating the conservation of baryon number given by the Standard Model)

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