Heat death of the universe

The heat death of the universe or just heat death is a theory about how our universe might end. It would involve entropy reaching its maximum state and thermodynamics ceasing. It will not happen for an extremely long time. The very earliest estimates place it as 10^100 years from now, or one with one hundred zeros. It may take even longer than that.

Part of a series on
Physical cosmology
Gravitational inverse-square law
Early universe
Backgrounds
Expansion · Future
Components · Structure
Components
Structure
Experiments
  • Scientists
Subject history
  • Discovery of cosmic microwave
    background radiation
  • History of the Big Bang theory
  • Religious interpretations of
    the Big Bang theory
  • Timeline of cosmological theories
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