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54.Birt Eastern part of Mare Nubium, where we find a great number of ridges. Not far from Birt Crater we find the well-known Rupes Recta. If the light comes in from the east it casts a broad shadow, also visible from Earth in smaller telescopes. If the light comes in from the west we see it as white stripe on the darker back ground. In bigger telescopes we can see a rille crossing Birt and Birt F. BIRT - William R. Birt. (1804-1881) English astronomer and selenographer.
HESIODUS - Hesiodos. (Ἡσίοδος) (ca.700 BC) Greek poet, major source on Greek mythology, farming techniques, early economic thought, archaic Greek astronomy and ancient time-keeping.
LASSELL - William Lassell (1799– 1880) English amateur astronomer. Using his self-build telescope he discovered the first Neptune Moon. And was co-discoverer (With Bond) of Saturn's 8th Moon, and of two Moons of Uranus. He also discovered 600 Nebulae.
LIPPERSHEY - Hans Leppersheij (Died: 1619) Dutch optician who invented the first telescope.
NICOLLET - Jean Nicholas Nicollet (1788 - 1843) French selenographer.
MARE NUBIUM - Sea of Clouds (Named by Giovanni Riccioli in 1651) ( Riccioli's Moon Map )
PITATUS - Pietro Pitatis (16th century) Italian astronomer and mathematician.
RUPUS RECTA - Straight Wall. Named by William R. Birt, discovery of the Straight Wall is usually attributed to J. H. Schröter. But Ashbook noticed it had actually been seen and drawn by Christiaan Huygens, using a 123-foot, (focal length), refractor on the nights of May 30-31, 1686.
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PROMONTORIUM TAENARIUM - Cape Taenarium. According to Hevelius the designation of cape Matapan, (or Taineron), on the Peloponnesos.
WOLF - Max Wolf (1863 - 1932) German astronomer, with the assistance of his co-workers he found more than 300 planetoids.
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