1. MARKOV

On the map we see part of the northwest of the side of the moon that is facing the Earth, clearly depicted is the Gulf of the Dew (Sinus Roris). The craters on the edge of the area are most clearly visible around the full moon’s libration.

CLEOSTRATUS - Cleostratus of Ténédos (Ξενοφάνης ὁ Κολοφώνιος). Born: around 500 BC in Ténédos. Greek Poet and Astronomer. Improved the Athenian calendar by implementing of an 8 year lunisolar cycle. Author of the system of signs of the Zodiac.  

Crater (65Km /38Mi Ř ) (77.0° W, 60.4° N) Circular formation. Few steep slopes supporting Cleostratus E and F to the North-West. High walls supporting Cleostratus M to the North and two craterlets to the South-West. Flat floor supporting a craterlet.

GALVANI - Luigi Galvani, Born: 1737 in Bologna - Died: 1798 in Bologna. Italian physicist and physician. Specialist of the compared anatomy. Discoverer of the nervous electrical impulse.

Crater (82Km / 48Mi Ř ) (84.6° W, 49.6° N). Circular formation situated in the zone of librations and overlapping Repsold. Few steep slopes. Few high walls supporting a crater to the South. Flat floor crossed by Rimae Repsold.

LANGLEY - Samuel P. Langley, Born in 1834 at Roxbury, USA - Died  in 1906 at Aiken, USA. American astronomer and physicist. Inventor of the bolometer in 1881. Measured the atmospheric permeability to the solar light. Constructor of a plane in 1896. Determined the permeability of the atmosphere for different wavelengths of the solar spectrum.  

Crater (61 Km /36 Mi Ř ) (86.3° W, 51.1° N) Damaged formation situated in the zone of librations. Few steep slopes supporting Galvani to the South-East Volta to the North. Few high walls supporting Langley K & J to the North. Eroded floor.

MARKOV - Andrei Andreyevich Markov (Андре́й Андре́евич Ма́рков) Born: 1856 in Riazan - Died: 1922  in Petrograd. Mathematician. Demonstrated inequalities of Tchebychev in 1884. Specialized in the theory of probabilities.

Crater (43Km / 25Mi Ř ) (Dept: 2,450m /7,400ft) (53.4° N, 62.7° W) The rim of this crater is not appreciably eroded by impacts, and retains a sharp edge at the crest. The perimeter is roughly circular, with some minor outward bulges particularly along the southern and eastern edge. The inner walls are simple slopes that continue down to a ring of debris along the base. The interior floor has a low central hill and some minor ridges. There are no craters of note within the interior or along the rim. 

OENOPIDES - Oenopides of Chios, (Οἰνοπίδης). Born around 500 BC in Chio - Lived till around 450 BC. Mathematician geometer and astronomer. Has measured the inclination of Ecliptic as compared to the celestial equator. He found this angle to be 24°, thus measuring the inclination of the earth's axis. Determination of the 12 signs of the Zodiac.  

 Crater (70 Km /41 Mi Ř ) (57.0° N, 64.1°W) Heavily eroded by impacts, low outer rim that is hilly and contains a few clefts. There is a gap in the southeastern rim, and the level interior is attached to the lunar mare to the south. There are several small craters lying near the eastern rim, and the flat floor of lava has hills and craterlets. To the southwest is the remnant of Oenopides R, of which only parts of the rim are still protruding above the surface and the southern rim is completely missing. Few steep slopes riddled with craterlets and crushed by Babbage to the North-East. Few high walls.

RÉGNAULT - Victor Régnault, Born, 1810 in Aachen, Germany - Died, 1878 in Paris, France. Chemist and physicist. Discoverer of the chloride of vinyl in 1835. Member of the Academy of Sciences in 1840. Has perfected the steam machine. Famous photographer.

Crater. (49 Km /29 Mi Ř ) (54.1° N, 88.0° W) Circular formation. Situated in the zone of librations. Steep slopes supporting Regnault C to the North-West. High walls. Flat floor.

REPSOLD - Johann G. Repsold. Born, 1771 in Germany - Died 1830 in Germany. Optician, inventor of Optical - Mechanical and Astronomical precisian instruments.

Crater  (111 Km /65 Mi Ř ) (51.4° N, 78.5° W) Eroded formation. Situated in the zone of librations. Few steep slopes highest to the East. Few high walls collapsed to the South. Flat floor supporting Rimae Repsold & Repsold G. craterlets.

SINUS RORIS - Bay of Dew. Arthur C. Clarke's novel "A Fall of Moondust" is set in a fictional "Sea of Thirst" located within Sinus Roris.

Mare. (202 Km / 125 Mi Ř ) (54.0° N, 56.6° W) Very flat Region uniting Mare Frigoris and Oceanus Procellarum.

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STOKES - Sir Georges Gabriel Stokes. Irish Mathematician and physicist. Born in 1819, Skreen, Ireland - Died 1903 in Cambridge, UK. Important contributions to spectral analysis and  hydrodynamics. Discoverer of the electromagnetic nature of X rays.

Crater. (53 Km /31 Mi Ř ) (52.5° N, 88.1° W) Circular formation situated in the zone of librations on the South-West slope of Volta. Steep slopes supporting Regnault to the north, many craterlets. High walls supporting a craterlet to the North, collapsed to the South. Flat and extensive floor

VOLTA - Comte Alessandro Volta, Italian Physicist. Born; 1745 Como, Italia - Died in 1827, Como, Italia. Inventor of the electroscope in 1782 and the first electrical battery in 1800.

Crater (116 Km /68 Mi Ř ) (54.0°N, 84.9°W) Situated in the zone of librations. Damaged formation. Few steep slopes supporting many craters, like Regnault and Stokes to the West. Few high walls supporting Volta K & J to the South. Flat floor.

XENOPHANES - Xénophane of Colophon. (Ξενοφάνης ὁ Κολοφώνιος). Greek Philosopher born in 570 BC, Colophon, Greece - Died in 478 BC. Poet and satirical author.

Crater. (124 Km /Mi Ř ) (57.6° N, 81.4° W) Situated in the zone of librations. Damaged formation. with a battered rim. Steep slopes supporting several craterlets to the North-East. Walls with terraces. Immense worn and eroded floor. Central mountain.