Autori: J. Budaj, A. Burrows, I.Hubeny, L. Ibgui Nazov: The internal heat loss from the day and the night sides of a strongly irradiated giant planet Abstract: The internal heat loss or cooling of a planet determines its structure and evolution. Based on the calculations of the models of the atmosphere we argue that the cooling on the day and the night side of a strongly irradiated planet may not be equal and the difference depends on several important parameters. If the day-night heat redistribution is very effective or if it takes place at the large optical depth then the day-side and the night-side cooling may be comparable. However, if the day-night heat transport is not effective or if it takes place at a shallow optical depth then there can be a big difference between the day-side and the night-side cooling and the night side may cool several times more effectively. An expected extra opacity in the stratosphere on the day side of the planet can enhance the day-side cooling contrary to the effect of the enhanced metalicity. If the stellar irradiation gets stronger e.g. due to the stellar evolution or migration this will reduce both the day and the night side cooling. These results may be relevant for the evolution of the planet and should be considered in the future evolutionary models.