system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why aren't there any green stars?
gpt
Stars emit light mostly based on their temperature which produces light of all wavelengths, but with a peak. The higher the temperature, the shorter the wavelength of the peak light and the more blue it appears. Colder stars peak at longer wavelengths of light and appear more red. Two stars with similar surface temperatures will emit light of very close to the same distribution.

Our Sun's peak is ~500nm while the color green is ~510nm. In this sense, our sun is a 'green' star, but we perceive its light as being white. Humans only see a narrow band of wavelengths and we are adapted to use the light in that range. Thus we see the natural illumination of the sun as 'white'.

So, there are 'green' stars but we see them as white because that is how our eyes and brains perceive that distribution of light.