There are no green stars because star colors come from their black-body spectrum. In other words, the color depends on temperature, much like a candle flame or heated bar of metal. The black-body spectrum does not include all of the colors of the rainbow. That being said, there arestars which have peak intensity in the green portion of the spectrum...

The black-body spectrum allows for violet, which occurs at a temperature around 39,700 K. That is quite a bit hotter than a blue star (~25000 K). However, the Morgan-Keenan (MK) classification system allows for Class O (“blue”) stars that emit significant ultraviolet radiation. While humans can’t see this light, these extremely hot stars are essent...

Our Sun is an example of a star that emits peak light in the green region of the spectrum. But, the Sun appears whiteas viewed from space because its apparent color is an average of all emitted wavelengths (which include red and blue). From Earth, sunlight is yellow because the atmosphere scatters blue light. Near sunrise and sunset, scattering is ...