关键词: 稳态时空, 黑体辐射, 热平衡, 温度

Abstract: The condition for thermal equilibrium in stationary space-time,which is a special case of curved space-times,is discussed.Using the Planck＇s theorem of blackbody radiation and principles of general relativity,we conclude two systems that have reached thermal equilibrium through thermal radiation have the same coordinate temperature but generally different proper temperature.

Key words: stationary space-time, blackbody radiation, thermal equilibrium, temperature