The western edge of Oceanus Procellarum, and the edge visible part of the Moon. Remarkable are the Rays starting at Olbers.
Crater. (37 Km /22 Mi ø ) (Dept: 1,160 m /3,500 ft) (26°30′ N, 69°06′ W) Outer rim not circular, outward bulges to the north-northeast and southward. At the midpoint a central ridge, extending to the north.
Crater. (190 Km /118 Mi ø ) Central mountain (45km /28 Mi ø ) (16.3°N, 88.7°W) Walled plain. Central mountain. This crater was only discovered as recently as 1952 by Patrick Moore.
SELEUCUS - Seleucus of Babylon. (150BC) Greek/Babylonian astronomer. Teaching around 150 BC, he is known to have been a follower of the heliocentric theory of Aristarchus of Samos, which stated that the Earth rotated around its own axis which in turn revolved around the Sun.
STRUVE - 1. Friedrich Georg Wilhelm Struve. (1793 - 1864). German/Russian astronomer, and first director of the Pulkovo Observatory. Observed double stars and was the first to determine a stellar parallax. 2. Otto Wilhelm Struve. (1819 - 1905) Son of Friedrich G. W. Struve, and also director of the Pulkovo Observatory, discoverer of a Uranus Moon. 3. Otto Struve (1897 - 1963) Russian - American astrophysicist, grandson of Friedrich G. W. Struve.
Crater. (51 km/30 Mi ø ) (Dept: 2,510 m /8235 ft ) (28.0°N, 88.1°W) Crater filled with lava.