Chris, your letter triggers such wonderful memories for me! As a teenager, I remembering reading a book listing a few stars (like the one in Libra you mentioned) as being green. I felt like a failure that they merely looked white to me. Turns out, they ARE white and those old authors were soon discredited. Best guess is that some observers first looked at a nearby reddish star (like Antares)and when they then quickly turned to observe a white one, their eyes projected the after-image, which is the complementary color!
Chris, your letter triggers such wonderful memories for me! As a teenager, I remembering reading a book listing a few stars (like the one in Libra you mentioned) as being green. I felt like a failure that they merely looked white to me. Turns out, they ARE white and those old authors were soon discredited. Best guess is that some observers first looked at a nearby reddish star (like Antares)and when they then quickly turned to observe a white one, their eyes projected the after-image, which is the complementary color!