How can the thermosphere have high tempuratures but not be hot?

The thermosphere can have extremely high temperatures, often exceeding 1,500 degrees Celsius (2,732 degrees Fahrenheit), due to the absorption of intense solar radiation by a sparse number of gas molecules. However, the air density in this layer is so low that there are very few particles to transfer heat, making it feel cold to human touch. Consequently, while temperatures are high in terms of kinetic energy, the lack of density means there is insufficient heat transfer to create a sensation of warmth.