Peaks Of Eternal Light

A peak of eternal light is a hypothetical point on an astronomical body's surface that is always in sunlight, requiring high latitude, high elevation, and a very small axial tilt. The existence of such peaks was first postulated by Beer and Mädler in 1837, who suggested the lunar polar mountains had "eternal sunshine". Detailed lunar topography has revealed points on crater rims that receive extended periods of sunlight, but no points receive perpetual light during both winter and summer. The ESA's SMART-1, NASA's Clementine, and JAXA's SELENE spacecraft have identified potential sites for peaks of eternal light at the lunar poles, including four locations along the rim of Peary crater near the north pole and a small number of illuminated ridges within 15 km of the south pole. The Malapert Mountain region, on the rim of the Malapert crater near the south pole, may also have high levels of illumination, with only 11% of the time receiving less than full sunlight.learn more on wikipedia