Lunar Anomalies: Ukert Crater
Ukert is a lunar impact crater situated between Mare Vaporum to the north and Sinus Medii in the south. The outer rim of this crater is not quite circular, with outward bulges to the north and the east. Ukert is a very unusual crater in that it displays a circumscribed equilateral triangle in its center at full Moon. This triangle may not be natural, because the sides of the crater are much brighter only opposite the sides of the triangle. In addition, the brightest parts of the rim are midway between the apices of the triangle, and are at 120 degrees orientation from one another. If a line is drawn from the centers of each bright area across the triangle to the opposing angle, the lines exactly bisect each angle.