Lacus Somniorum [SEP] located on astronomical body
Lacus Somniorum
Lacus Somniorum is a plain located in the northeastern part of the Moon's near side. It is located at selenographic coordinates 38.0° N, 29.2° E, and has a diameter of 384 kilometers. (It is the largest of the lunar features designated "Lacus".) The name is Latin for Lake of Dreams, a title given to this feature by Riccioli.
Lacus Somniorum is an irregular feature with complex, somewhat ill-defined borders. The surface has the same low albedo as the
Posidonius (crater)
Posidonius is a lunar impact crater that is located on the north-eastern edge of Mare Serenitatis, to the south of Lacus Somniorum. It was named after ancient Greek philosopher and geographer Posidonius of Apamea. The crater Chacornac is attached to the southeast rim, and to the north is Daniell.
Description.
The rim of Posidonius is shallow and obscured, especially on the western edge, and the interior has been overlain by a lava flow in the past. The crater ramparts can still be