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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 .
Selenographia, sive Lunae descriptio (Selenography, or A Description of The Moon) was printed in 1647 and is a milestone work by Johannes Hevelius. It includes the first detailed map of the Moon, created from Hevelius's personal observations. [1] In his treatise, Hevelius reflected on the difference between his own work and that of Galileo Galilei.
Selenography – study of the surface and physical features of the Moon. Historically, the principal concern of selenographists was the mapping and naming of the lunar maria, craters, mountain ranges, and other various features.
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.
This list is not comprehensive, as surveying of the Moon is a work in progress. Heights are in meters; most peaks have not been surveyed with the precision of a single meter.
The Pre-Nectarian period is defined from the point at which the lunar crust formed, to the time of the Nectaris impact event. Nectaris is a multi-ring impact basin that formed on the near side of the Moon, and its ejecta blanket serves as a useful stratigraphic marker. 30 impact basins from this period are recognized, the oldest of which is the South Pole–Aitken basin.
The last image we have of Patrick Cagey is of his first moments as a free man. He has just walked out of a 30-day drug treatment center in Georgetown, Kentucky, dressed in gym clothes and carrying a Nike duffel bag.
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