In thermodynamics, cosmological thermodynamics or "astrothermodynamics" is the study of the relation between the laws of thermodynamics and the functioning, dynamics, and evolution of the universe, from the sub-atomic to super-galactic range. Topics in this field is black hole thermodynamics, black hole entropy, and the Boltzmann brain problem.

Cosmic evolution, according to current consensus, is governed largely by the laws of physics, particularly those of thermodynamics. [1] The general nature of the thermodynamic operation of the universe, however, is relatively unknown, depending on phenomenon such as dark energy, boson-fermion relationships, the open or closed thermodynamic system possibilities of the universe, the puzzling rate of expansion of the universe, a lack of a unified theory of the fundamental forces or interactions, e.g. electromagnetic vs. gravity, the nature of black holes and entropy, etc.

Human thermodynamics
The central question in human thermodynamics is how does the thermodynamic operation of the universe relate, interact, or connect to the thermodynamic operation of human life, if at all?

References
1. Chaisson, Eric J. (2001). Cosmic Evolution - the Rise of Complexity in Nature. Cambridge, Massachusetts: Harvard University Press.

Further reading
● Akbar, M. (2008). “Viscous Cosmology and Thermodynamics of Apparent Horizon” (abstract), Chinese Phys. Lett. 25: 4199-4202.
● Lavenda, Bernard H. (1995). Thermodynamics of Extremes (backcover). Horwood Publishing.

External links
● Thermodynamics of the universe - Wikipedia.