Great article Bob! I think some people perceive some stars as green. Sometimes I've heard the visual double Albireo described as a yellow-green double. Albireo beta is spectroscopic blue, but nearness to the its visual double causes some people (even occasionally myself) to see it as green.
Great article Bob! I think some people perceive some stars as green. Sometimes I've heard the visual double Albireo described as a yellow-green double. Albireo beta is spectroscopic blue, but nearness to the its visual double causes some people (even occasionally myself) to see it as green.