Also on these boards
« Phases de la lune », dans Muhammed ibn Emir Hasan al-Su'udi. Matâli el-saadet,
Boethius, De musica, f.43v, (211 x 144 mm), 12th century -This is a manuscript about the theory of music. It was copied probably in England at Christ Church, Canterbury, in the second quarter of the twelfth century. Its main focus is the mathematical basis of music - Alexander Turnbull Library, MSR-05., via Flickr.
earth's crust with the evolutionary history of the species j.l. agassiz - 1851
Abu Mūsā Jābir ibn Hayyān often known simply as Geber(c.721–c.815) was a prominent polymath: a chemist and alchemist, astronomer and astrologer, engineer, geographer, philosopher, physicist, and pharmacist and physician.
The Kabbalistic Tree of Life with the names of the Sephiroth and paths--graphic image from medieval Jewish mysticism.
In the esoteric tradition the Orphic Egg represents the soul of the philosopher, the serpent symbolizing the Mysteries. The egg signifies the Cosmos as encircled by the fiery Creative Spirit. The egg, a symbol for the earth, around which the snake (a feminine symbol, as is the moon) winds itself. The spiraling snake resembles the path our moon takes - the head and the tip of the serpent’s tail representing the moon’s position at its apparent halt in orbit.
Astronomicum Caesareum Michael Ostendorfer. 1520-1549. Renaissance instructive manual explaining the use of the astrolabe (for calculating the altitude of stars) and other instruments used for computing planetary positions. The author, court astronomer to Emperor Charles V, also provided new observations on the comet of 1531 (Halley's Comet).