明暗交界线

A full Moon is shown but with a much more detailed surface than is usually visible. Many craters, dark lunar mare, and light lunar highlands are discernable. Please see the explanation for more detailed information.
一轮满月展现在眼前，但其表面细节远超平常所见。许多环形山、暗色的月海和明亮的月陆清晰可见。有关更多详细信息，请参阅说明。