Saturday, 11 June 2016

Why aren’t there any green stars?


Actually, there are a lot of them, including our own Sun!



Thanks to Peter for this item.
/ star stars astronomer astronomy black body radiator black body radiation spectrum spectra planet brown dwarf black hole visible light radio waves infrared infra-red infra red ultraviolet ultra-violet ultra violet Xrays X-rays X rays peak black hole light black body curve emission spectra spectrum peak peaks temperature higher energy light shorter wavelength gamma rays visible light shine human eye sensitive sensitivity cells retina rods cones color colour red blue green see primary colours Doctor Michelle Thaller Dr. Michelle Thaller Ask an Astronomer Spitzer Space Telescope NASA /