50.Darwin

The western edge of the visible side of the Moon We see a part of the Mare Orientalis basin, and rima Sirsalis. (See also chart 39 ).

LACUS AESTATIS - The Summer Lake. Named so by Julius Heinrich Franz (1847 - 1913).   

Lacus (90km/56Mi ø ) (1,000 km2 /386Mi2 ) (14.83° S, 68.57° W) Two smaller areas of lunar mare located near the western limb of the Moon.

LACUS AUTUMNI - The Autumn Lake. Named by Julius Heinrich Franz (1847 - 1913).

Lacus (183Km /114Mi ø ) (9.9°S, 83.9°W) Lacus Autumni lies in the northeastern quadrant of the gap between Montes Rook and Montes Cordillera. Very hard to observe from the Earth.

BYRGIUS - Jost Bürgi (1552 - 1632) Swiss mathematician, clockmaker and maker of astronomical instruments. Invented logarithms independently from John Napier, but did not publish his findings.

Crater (84Km /52Mi ø ) (Dept: 2,130m /6,988ft) (24.79°S, 65.39°W) Byrgius A has a ray system.

MONTES CORDILLERA - Montes Cordillera. Named by Johann Heinrich von Mädler in 1837.

Montes (574km/357Mi ø) (Dept: 6,000m /19,685ft) (48.7°N, 34.3°W) Part of a circular mountain range, forming the outer rim of the Mare Orientalis basin.

CRÜGER - Peter Krüger. (1580 - 1639) German mathematician, and teacher of Hevelius.

Crater (46Km /28Mi ø ) (Dept:  530m /1,738ft) (16.71°S, 66.91°W) Circular crater, dark flooded floor.

DARWIN - Charles Darwin. (1809 - 1882) English biologist and botanist.

Crater. (122km/75Mi ø ) (Dept: 1,360m /4,462ft) (19.82°S, 69.16°W) Partly destroyed walled plain.

EICHSTÄDT - Lorenz Eichstaedt. (1569 - 1660) German astronomer, mathematician and physician.

Crater (49km/30Mi ø ) (Dept: 4,520m /14,829ft) (22.65°S, 78.38°E) Crater at the edge of the Montes Cordillera.

KRASNOV - Alexander V. Krasnov. (1866 - 1911) Russian astronomer and selenographer. Made measurements on Lunar libration using a helio-meter.

Crater (42km /26Mi ø ) (Dept: 4,560m /14,960ft) (29.96°S, 79.78°W) Sharp edged rim with Krasnov A and B on the rim. Small central mountain.

LAMARK - Jean-Baptiste Lamarck. (1 August 1744 – 18 December 1829).  French naturalist. Published a paper on the influence of the Moon on Earths Atmosphere.

Crater (100km /62Mi ø ) (Dept: 2,8km /1.73Mi) (22.9°S 69.8°W). Crater heavily damaged by subsequent impacts.

MARE ORIENTALE - Eastern Sea. First named by German astronomer Julius Franz in his 1906 book Der Mond ("The Moon"). Franz's discoveries were not well known, and in the 1976 edition of his book Guide to the Moon, Patrick Moore claimed that he and H P Wilkins, discovered and named Mare Orientale in 1946. However later, Moore credits Franz as discoverer, (in his 2009 Yearbook of Astronomy). The Sea is in the west, as seen from the lunar surface. Before the space age, the western part of the Moon was called the eastern part.

Mare. (327 km/ 203 Mi ø ) (19.4°S, 92.8°W) Lunar sea. Circular in shape, site of a Mascon.

PETTIT - Edison Pettit. (1889 – 1962) American astronomer. Specialized in solar astronomy. Observed mars and Jupiter.

Crater (37Km /23Mi ø ) (Dept: 3,910m/12,828ft) (27.57°S, 86.73°W) Forms a double-crater with Nicholson.

 

 

 

 

 

 

   

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MONTES ROOK - Laurence Rooke. (1622 - 1666) English astronomer. Observed the Jovian moons.

Mountains ( 791Km /429Mi ø ) (Length: ca. 900km /559Mi ) (Max. Height: 6,000m /19,685ft) (20.6°S, 82.5°W) Mountain range shaped like a  double-ring, that is part of the system of rims around the centre of Mare Orientalis. In-between the rings Lacus Veris.

LACUS VERIS -  The Spring Lake. Named so by Julius Franz, in his "Die Randlandschaften des Mondes" (1913).

Lake (396Km /246Mi ø ) (12,000 km2 /4,633Mi2) (16.48°S, 85.91°W) Lake in-between the edges of Montes Rook. The Mare extends along an irregular 90° arc from east to north that is centered on the Mare Orientale.

 

 

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