* Blackbody Radiation: Stars, like all objects, emit radiation based on their temperature. This is described by the concept of blackbody radiation.
* Wien's Displacement Law: This law states that the peak wavelength of radiation emitted by a blackbody is inversely proportional to its temperature.
* Color and Temperature: Hotter stars emit more radiation at shorter wavelengths, which fall into the blue and ultraviolet parts of the electromagnetic spectrum. Cooler stars emit more radiation at longer wavelengths, appearing red or orange.
Therefore, the blue-white color of very hot stars indicates their extremely high surface temperatures.