  The process of sunspot formation is considered with the account of heat
effects. According to the Le Chatelier principle, a local overheating must
precede to the cooling of solar surface in the places of sunspot formation. The
sunspot dynamics is a process close to the surface nucleate-free boiling in a
thin layer with formation of bubbles (or craters), so we focus on the analogy
between these two processes. Solar spots and surface nucleate-free boiling in a
thin layer have similarities in formation conditions, results of impact on the
surface were they have been formed, periodicity, and their place in the
hierarchy of self-organization in complex systems. The difference is in the
working medium and method of channelling of extra energy from the overheated
surface -for boiling process, the energy is forwarded to generation of vapor,
and in sunspots the solar energy is consumed to formation of a strong magnetic
field. This analogy explains the problem of a steady brightness (temperature)
of a spot that is independent of the spot size and other characteristics.
