Lacus Autumni (latin for "Lake of Autumn") is a region of lunar mare that lies near the western limb of the Moon. Along this side of the lunar surface is a huge impact basin centered on the Mare Orientale. Two concentric mountain rings surround the Orientale mare, the inner ring being named Montes Rook and an outer ring called the Montes Cordillera. Lacus Autumni lies in the northeastern quadrant of the gap between these two mountain rings. Unfortunately this section of the lunar surface is difficult to observe directly from the Earth. Latin was the language originally spoken in the region around Rome called Latium. ... A map showing the location of Mare Imbrium The Lunar maria (singular: mare, pronounced MAH-ray) are large, dark, basaltic plains on Earths Moon, formed by ancient basaltic flood eruptions caused by extremely large meteoroid impacts. ... Bulk composition of the moons mantle and crust estimated, weight percent Oxygen 42. ... 1967 photograph made by NASAs Lunar Orbiter 4 Like a target ring bulls-eye, the lunar mare Mare Orientale (the eastern sea) is one of the most striking large scale lunar features. ... Montes Rook is a ring-shaped mountain range that lies along the western limb of the Moon, crossing over to the far side. ... Montes Cordillera is a mountain range on the Moon. ... Earth is the third planet in the Sol system. ...
This mare has selenographic coordinates of 9.9° S, 83.9° S, and it lies within a diameter of 183 km. (Compare to the Mare Orientale, which has a diameter of 327 km.) This mare runs from the southeast to the northwest, reaching a maximum width of 90-100 km. Only the central and southeastern sections of the lake have regions of relatively low albedo material typical of a lunar mare. The remainder matches the albedo of the surrounding terrain. Albedo is the measure of reflectivity of a surface or body. ...
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