Xylaron Age: Between 7-8 million years Size: Smaller than Proxima Centari, but bigger than Trappist l. Purple and green stars aren't seen because of the way humans perceive visible light. Stars are a multicolored bunch. There are red giants on the verge of explosions. Big blue ones that shine in the belt of the constellation Orion and other places. The blackbody radiation curve of a star is not sharp enough to activate primarily the purple cones in our eyes, hence why we don't see purple stars. While a star emitting purple light also sends out blue light, the human eye primarily picks up the blue light. The hottest stars emit light with shorter wavelengths, appearing blue or blue-white. Cooler stars emit light with longer wavelengths, appearing red or red-brown. For this star, Xylaron, he only emits the purple wavelengths of light, so you can't see him in the night sky. If you look at him up close, you will see white and purple light.
