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Diagram of Planetary Courses in the Zodiacal Signs
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Diagram of Planetary Courses in the Zodiacal Signs


Description Provenance Credit
Description In this diagram, the names of the seven planetary bodies – the Sun, the Moon, and the five known planets – are written along the vertical, at left. At top, along the horizontal, are the zodiacal names. One may follow the path of each planetary body through the zodiac by reading the graph from left to right. The diagram gives a sense not only of the independence of each planet's orbit, but also of the different lengths of time it took each planet to complete one circuit of the zodiac. Along the bottom of the diagram is a list of the planetary bodies, with their distances given as musical values -- a tone (tonus), a semitone (semitonium), or three semitones (tria semitonia) -- as well as an abbreviated account of interplanetary distances, given as proportions of the distance from Earth to the Moon.
Provenance Gruel and Englemann Collection, Paris [1]; acquired by Henry Walters, Baltimore, 1903; by bequest to Walters Art Museum, 1931. [1] no. 131, bookplate on inside upper board
Credit Acquired by Henry Walters, 1903

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Period
late 12th century
Medium
ink and pigments on medium-weight parchment
(Manuscripts & Rare Books)
Accession Number
W.73.5V
Measurements
H: 10 1/2 × W: 6 1/8 in. (26.7 × 15.5 cm)
Geographies
Location Within Museum
Not On View

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