1 of 5000

|

wood prints space wood prints book wood prints 1200s wood prints 1230 wood prints 13th century wood prints astronomical wood prints astronomy wood prints chart wood prints diagram wood prints extract wood prints french wood prints historical wood prints history wood prints history of science wood prints illustration wood prints

photographs space photos book photos 1200s photos 1230 photos 13th century photos astronomical photos astronomy photos chart photos diagram photos extract photos french photos historical photos history photos history of science photos illustration photos

Add This Artwork to Your Favorites Collection

Comment

Add This Artwork to Your Favorites Collection

Comment

Medieval chart of the decemnovenale cycle. 1230 extract from De sphaera mundi, by the Parisian astronomer and monk Johannes de Sacrobosco (circa 1195-1256), with a chart showing the decemnovenale cycle, the cycle of epacts, and the cycle of the 'claves.' De sphaera mundi is a short astronomy textbook that was widely read and influential in Europe as an introduction to astronomy. Sacrobosco is also known for writing a short introduction to the Hindu-Arabic numeral system, which became the most widely read introduction to the subject in the later mediaeval centuries. He also correctly described the defects of the then-used Julian calendar and recommended what was essentially the Gregorian calendar.

Science Photo Library (SPL) is the leading source of science images and footage. Sourced from scientific and medical experts, acclaimed photographers and renowned institutions, our content is unrivaled worldwide. Outstanding quality, accuracy and commitment to excellence are deeply embedded in our DNA. Science Photo Library inspires creative professionals and delivers engaging content of the highest quality for a wide range of clients in a variety of sectors. Visit sciencephoto.com for more information and stay connected on Twitter, LinkedIn, Instagram and Vimeo.