Salisbury J W, Hunt G R
Science. 1967 Mar 3;155(3766):1098-100. doi: 10.1126/science.155.3766.1098.
Infrared images of the thermal anomaly associated with the lunar crater Tycho were obtained during the lunar night after Tycho had ceased to be illuminated by the Suin for as long as 97 hours. In agreement with results of previous studies, these measurements show that the crater is warmer than its surroundings during the lunar night, and that the temperature of the thermal anomaly gradually decreases with time, being no longer detectable after new moon. This work provides strong evidence that the steeper crater walls facing the Sun before local sunset are warmer throughout the cooling phase, and that the Tycho anomaly is thus produced by solar, rather than internal, heat.
在第谷环形山不再被太阳光照长达97小时后的月夜期间，获取了与第谷环形山相关的热异常红外图像。与先前研究结果一致，这些测量表明，在月夜期间该环形山比其周围环境更温暖，并且热异常的温度随时间逐渐降低，在新月后便不再能被检测到。这项工作提供了有力证据，表明在当地日落前朝向太阳的较陡峭环形山壁在整个冷却阶段都更温暖，因此第谷环形山的异常是由太阳热量而非内部热量产生的。
