Mare Serenitatis
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Mare Serenitatis

Mare Serenitatis ("Sea of Serenity") is a lunar mare located to the east of Mare Imbrium on the Moon. Its diameter is 674 km (419 mi) long covering about 7.5% of the circumference of the Moon.

Geology

Mare Serenitatis is located within the Serenitatis basin, which is of the Nectarian epoch. The material surrounding the mare is of the Lower Imbrian epoch, while the mare material is of the Upper Imbrian epoch. The mare basalt covers a majority of the basin and overflows into Lacus Somniorum to the northeast. The most noticeable feature is the crater Posidonius on the northeast rim of the mare.[3] The ring feature to the west of the mare is indistinct, except for Montes Haemus. Mare Serenitatis connects with Mare Tranquillitatis to the southeast and borders Mare Vaporum to the southwest. Mare Serenitatis is an example of a mascon, an anomalous gravitational region on the moon.

A mass concentration (mascon), or gravitational high, was identified in the center of Mare Serenitatis from Doppler tracking of the five Lunar Orbiter spacecraft in 1968.[4] The mascon was confirmed and mapped at higher resolution with later orbiters such as Lunar Prospector and GRAIL.

Names

Like most of the other maria on the Moon, Mare Serenitatis was named by Giovanni Riccioli, whose 1651 nomenclature system has become standardized.[5] Previously, William Gilbert had included it among the Regio Magna Occidentalis ("Large Western Region") in his map of c.1600.[6]Pierre Gassendi had included it among the 'Homuncio' ('little man'), referring to a small humanoid figure that he could see among the maria; Gassendi also referred to it as 'Thersite' after Thersites, the ugliest warrior in the Trojan War.[7]Michael Van Langren had labelled it the Mare Eugenianum ("Eugenia's Sea") in his 1645 map,[8] in honour of Isabella Clara Eugenia, queen of the Spanish Netherlands.[9] And Johannes Hevelius included it within Pontus Euxinus (after the classical name for the Black Sea) in his 1647 map.

Exploration

Both Luna 21 and Apollo 17 landed near the eastern border of Mare Serenitatis, in the area of the Montes Taurus range. Apollo 17 landed specifically in the Taurus-Littrow valley, and Luna 21 landed in Le Monnier crater.

Lunar nearside with major maria and craters labelled.

Selenography

Numerous craters in and touching the sea include Abetti, Banting, Bessel, Bobillier, Borel, Deseilligny, Finsch, Linné, Le Monnier, Luther, Sarabhai and Very and a few more. Ridges inside and touching the sea (plain) include Dorsa Aldrovandi, Dorsum Azara, Dorsum Buckland, Dorsum Von Cotta, Dorsum Gast, Dorsa Lister, Dorsum Nicol, Dorsum Owen, Dorsa Smirnov and Dorsa Sorby.

Views

In popular culture

References

  1. ^ "Moon Mare/Maria". Gazetteer of Planetary Nomenclature. USGS Astrogeology. Retrieved . 
  2. ^ "Mare Serenitatis". NASA Lunar Atlas. Retrieved .  External link in |publisher= (help)
  3. ^ "Lunar Map". Central Coast Astronomical Society. Archived from the original on July 18, 2009. Retrieved .  External link in |publisher= (help)
  4. ^ P. M. Muller, W. L. Sjogren (1968). "Mascons: Lunar Mass Concentrations". Science. 161 (3842): 680-684. doi:10.1126/science.161.3842.680. PMID 17801458. 
  5. ^ Ewen A. Whitaker, Mapping and Naming the Moon (Cambridge University Press, 1999), p.61.
  6. ^ Ewen A. Whitaker, Mapping and Naming the Moon (Cambridge University Press, 1999), p.15
  7. ^ Ewen A. Whitaker, Mapping and Naming the Moon (Cambridge University Press, 1999), p.33.
  8. ^ Ewen A. Whitaker, Mapping and Naming the Moon (Cambridge University Press, 1999), p.41, 198.
  9. ^ http://galileo.rice.edu/Catalog/NewFiles/langren.html

External links

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