While camping, I noticed that if you look long enough at almost any star, you start seeing some tiny, subtle colors in that star. Even crazier, they sometimes flicker between more colors. In my case orange, blue and something like cyan.
Besides constellations, what else could you observe regarding starts, with the naked eye?
Its ‘true’. But we just call those kinds of stars white. Green is the middle wavelength we can see (because our suns output is centered there). It also outputs lots of all visible light though. Red stars and Blue stars are red or blue because their central output is shifted towards a different part of the EM spectrum, and red/blue are the outer wavelengths on either side.