Science. 1962 Dec 21;138(3547):1340-1. doi: 10.1126/science.138.3547.1340.
Size comparisons of the moon are made from different locations by direct viewing (as opposed to comparisons by instrumental techniques). Under the proper conditions, the illusion is seen while the moon's position remains essentially unaltered. By this means, evidence is adduced in favor of Ptolemy's apparent-distance hypothesis.
通过直接观测（与仪器技术比较相对），从不同位置对月球的大小进行比较。在适当的条件下，当月球的位置基本不变时，就会产生这种错觉。通过这种方法，提出了支持托勒密视距假说的证据。
