SOLAR SYSTEM

Detailed explanation-1: -Red stars are the coolest. Yellow stars are hotter than red stars. White stars are hotter than red and yellow. Blue stars are the hottest stars of all.

Detailed explanation-2: -The color of a star is linked to its surface temperature. The hotter the star, the shorter the wavelength of light it will emit. The hottest ones are blue or blue-white, which are shorter wavelengths of light. Cooler ones are red or red-brown, which are longer wavelengths.

Detailed explanation-3: -O stars are the hottest, with temperatures from about 20, 000K up to more than 100, 000K. These stars have few absorption lines, generally due to helium. These stars burn out in a few million years.