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For precise applications, many coordinate systems have been defined for the Moon, each with a slightly different prime meridian. The IAU recommends the "mean Earth/polar axis" system, [1] in which the prime meridian is the average direction (from the Moon's center) of the Earth's center. [2]
14.1° N 45.0° E 143 km Sinus Aestuum: Seething Bay 10.9° N 8.8° W 290 km Sinus Amoris: Bay of Love 18.1° N 39.1° E 130 km Sinus Asperitatis: Bay of Roughness 3.8° S 27.4° E 206 km Sinus Concordiae: Bay of Harmony 10.8° N 43.2° E 142 km Sinus Fidei: Bay of Trust 18.0° N 2.0° E 70 km Sinus Honoris: Bay of Honor 11.7° N 18.1° E 109 km
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 .
In astronomy, coordinate systems are used for specifying positions of celestial objects (satellites, planets, stars, galaxies, etc.) relative to a given reference frame, based on physical reference points available to a situated observer (e.g. the true horizon and north to an observer on Earth's surface). [1] Coordinate systems in astronomy can ...
Chart of lunar maria with lines of longitude and latitude. The prime meridian is the centre of the near side of the Moon.. A planetary coordinate system (also referred to as planetographic, planetodetic, or planetocentric) [1] [2] is a generalization of the geographic, geodetic, and the geocentric coordinate systems for planets other than Earth.
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.
Lunar north polar region mosaic by LRO.The north pole is in the center. The lunar north pole is the point in the Northern Hemisphere of the Moon where the lunar axis of rotation meets its surface.
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