Evidence of what? It just shows the same effect that is visible in the setting sun - just much less evident because of the few km of atmosphere in between, compared with what you get when the sun is at the horizon.
It says that the sun's temperature is about 6kK - no surprises there.
No surprises there? THATS THE REASON IT LOOKS WHITE FROM SPACE! BECAUSE IT'S 6000 Kelvin.
Look at image 7) I this was taken by astronomers working at kitt peak.