Mare Frigoris

Mare Frigoris
Mare Frigoris is the dark grey material in the lower portion of this photo
Coordinates56°00′N 1°24′E / 56.0°N 1.4°E / 56.0; 1.4
Diameter1,446 km (899 mi)[1]
EponymSea of Cold

Mare Frigoris /frɪˈɡɔːrɪs/ (Latin frīgōris, the "Sea of Cold") is a lunar mare in the far north of the Moon. It is located in the outer rings of the Procellarum basin, just north of Mare Imbrium, and stretches east to north of Mare Serenitatis. It is just north of the dark crater Plato.

The basin material surrounding the mare is of the Lower Imbrian epoch, while the eastern mare material is of the Upper Imbrian epoch, and the western mare material is of the Eratosthenian epoch.[citation needed]

Like most of the other maria on the Moon, Mare Frigoris was named by Giovanni Riccioli, whose 1651 nomenclature system has become standardized.[2] Previously, William Gilbert had included it among the Insula Borealis ("Northern Island") in his map of c.1600,[3] and Michael van Langren had labelled it the Mare Astronomicum ("Sea of Astronomy") in his 1645 map.[4] Pierre Gassendi called it the Boreum Mare ('Northern Sea').[5]

Mare Frigoris and near structures (selenochromatic Image)
Lunar Orbiter 4 image of Mare Frigoris and vicinity. This regional view is nearly orthogonal at top but highly oblique at bottom, and north is up and slightly to the right. Mare Frigoris is the dark band extending from upper left to lower right. Mare Imbrium and Sinus Iridum are in lower left. Prominent craters include Plato with dark flat floor in bottom center, Harpalus near left edge within the mare, Philolaus at top center, and Aristoteles in lower right within the mare.
  1. ^ "Mare Frigoris". Gazetteer of Planetary Nomenclature. USGS Astrogeology Research Program.
  2. ^ Ewen A. Whitaker, Mapping and Naming the Moon (Cambridge University Press, 1999), p.61.
  3. ^ Ewen A. Whitaker, Mapping and Naming the Moon (Cambridge University Press, 1999), p.15
  4. ^ Ewen A. Whitaker, Mapping and Naming the Moon (Cambridge University Press, 1999), p.41, 198.
  5. ^ Ewen A. Whitaker, Mapping and Naming the Moon (Cambridge University Press, 1999), p. 33.