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The rhumb-line construction scheme and geographic lines in the Cantino planisphere. Adapted from Gaspar (2012), Plate 3. The Cantino planisphere is the earliest extant example of the so-called latitude chart, which was developed following the introduction of astronomical navigation, during the second half of the fifteenth century.
Philips' Planisphere, ca. 1900. In astronomy, a planisphere (/ ˈ p l eɪ. n ɪ ˌ s f ɪər, ˈ p l æ n. ɪ-/) is a star chart analog computing instrument in the form of two adjustable disks that rotate on a common pivot.
Born as Diogo Ribeiro, he was the son of Afonso Ribeiro and Beatriz d’Oliveira. [3] However, there is no known record of the date and place of his birth.