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  2. Selenographic coordinate system - Wikipedia

    en.wikipedia.org/wiki/Selenographic_coordinate...

    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.

  3. Selenography - Wikipedia

    en.wikipedia.org/wiki/Selenography

    Print/export Download as PDF; Printable version; In other projects Wikimedia Commons; ... Selenographic coordinate system; List of maria on the Moon;

  4. Lunar geologic timescale - Wikipedia

    en.wikipedia.org/wiki/Lunar_geologic_timescale

    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.

  5. Subsolar point - Wikipedia

    en.wikipedia.org/wiki/Subsolar_point

    The subsolar point moves constantly on the surface of the Earth, but for any given time, its coordinates, or latitude and longitude, can be calculated as follows: [3] ϕ s = δ , {\displaystyle \phi _{s}=\delta ,} λ s = − 15 ( T G M T − 12 + E m i n / 60 ) . {\displaystyle \lambda _{s}=-15(T_{\mathrm {GMT} }-12+E_{\mathrm {min} }/60).}

  6. Copernicus (lunar crater) - Wikipedia

    en.wikipedia.org/wiki/Copernicus_(lunar_crater)

    Copernicus is a lunar impact crater located in eastern Oceanus Procellarum.It was named after the astronomer Nicolaus Copernicus. [1] It typifies craters that formed during the Copernican period in that it has a prominent ray system.

  7. Geodetic coordinates - Wikipedia

    en.wikipedia.org/wiki/Geodetic_coordinates

    Geodetic latitude and geocentric latitude have different definitions. Geodetic latitude is defined as the angle between the equatorial plane and the surface normal at a point on the ellipsoid, whereas geocentric latitude is defined as the angle between the equatorial plane and a radial line connecting the centre of the ellipsoid to a point on the surface (see figure).