Have you ever wondered why there are no green stars? A good educated guess is that it’s related to the narrow spectrum of visible light, that green is in the middle of the red, green, blue spectrum which together makes white light. But this video gives a more detailed and comprehensible explanation of the science that the layperson can understand.
Where he lost me was when he hypothesized about how a star could appear green: an alien intelligence using “Dyson spheres” and “building a green filter around a star as a beacon” to attract attention. But why create massive constructions when radio signals would be easier and detectable much further away? Otherwise, it’s worth fifteen minutes (except for the ad from 5:20 to 6:20).