Here I had been thinking the Unruh horizons and specifically black hole horizons were the only (thermal) radiators. Now I notice Leonard Susskind says in THE BLACK HOLE WAR that the cosmological horizon also radiates...but "inward" towards us. If a thermometer on a string were extended close to the cosmological horizon, he says ".....we would discoverer the temperature increases eventually approaching the infinite temperature at the horizon of a black hole..." What do you think?? If that's accepted or at least a rational theoretical idea, would a suspended (stationary) observer inside a black hole horizon also observe such radiation....thermal type???? Seems like one would but I've never seen that stated anywhere.