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The selenographic colongitude is the longitude of the morning terminator on the Moon, as measured in degrees westward from the prime meridian. The morning terminator forms a half-circle across the Moon where the Sun is just starting to rise. As the Moon continues in its orbit, this line advances in longitude.
Selenography is the study of the surface and physical features of the Moon (also known as geography of the Moon, or selenodesy). [1] Like geography and areography , selenography is a subdiscipline within the field of planetary science .
The latitudes and longitudes are in selenographic coordinates. Albedo ... Antonín Rükl, Atlas of the Moon, Kalmbach Books, 1990, ...
Lacus Somniorum (Latin somniōrum, "Lake of Dreams") is a basaltic plain located in the northeastern part of the Moon's near side. It is located at selenographic coordinates 37.56° N, 30.8° E, and has a diameter of 424.76 kilometers. [1] The name is Latin for Lake of Dreams, a title given to this feature by Giovanni Riccioli. [2]
Montes Cordillera is a mountain range on the Moon. This feature forms the outer ring of peaks surrounding the Mare Orientale impact basin, with the inner ring formed by the Montes Rook. [1] The center of the range is located at selenographic coordinates 17.5° S, 81.6° W, and the diameter spans 574 km (357 mi).
Mons Hadley is a massif in the northern portion of the Montes Apenninus, a range in the northern hemisphere of the Moon. It has a height of 4.5 km (2.8 mi) 14,764 ft (4,500 m) above the adjacent plain and a maximum diameter of 25 km at the base.
Palus Somni / ˈ p eɪ l ə s ˈ s ɒ m n aɪ / (Latin palūs somnī "Marsh of Sleep") is an area on the Moon of relatively level but somewhat uneven terrain that lies along the northeastern edge of Mare Tranquillitatis and the Sinus Concordiae. It has selenographic coordinates 14.1° N, 45.0° E, and has a diameter of 163 km.
The selenographic coordinates of this feature are , and it has a length of about 427 km. The southeastern end of the cliff terminates along the western edge of the crater Piccolomini. It then arcs irregularly towards the north, climbing to heights of nearly a kilometer.