#PhysicsFactlet
Cold stars look red. Hot stars look blue. But there is no green star.
To be more precise: stars emit a very broad and temperature-dependent spectrum , so intermediate temperature stars excite in roughly equal measure all 3 of the color receptors in our eyes.
There are green galaxies, but that is a story for another time 😉
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@j_bertolotti great gif! is your animation taking into account that the human eye does not detect the whole visible range with equal sensitivity? I thought greatest sensitivity is around 550nm (greenish) and significantly lower around 450nm.
@PedroMiguel Thanks!
I downloaded the eye sensitivity curves from www.cvrl.org