The crater Copernicus is a classic target for moon observers. As one of the youngest of the large impact craters, it offers many interesting features throughout the lunar day. When near the terminator the ruggednes of its wall with terraces and its iterior is evident. Also the hummockey texture of its ejecta blanket in the immediate surroundings of the crater can be appreciated. When the sun climbs higher above the crater, the enormous extensions of the ejecta blanket becomes clear.

This crater is thus also a beatiful illustration of the changing view of features an observer gets throughout the lunar day. When near the terminator light and shadow show the topography and with a higher sun albedo features become better visible. Of these albedo features, ejecta blankets and ray systems around craters are perhaps the most impressive examples. The Moon never gets boring!