Latest Analog computers Stories

2008-07-31 15:45:00

The British Museum will maintain possession of a rare astronomy tool from the 14th-century that helped scientists tell time after being outbid for the item last year. The astrolabe quadrant is a brass device that was selling at an auction last year, but the museum was initially lost out on its purchase. But money from the National Heritage Memorial fund, The Art Fund and the British Museum Friends helped the museum purchase it recently for 350,000 pounds ($700,000). "The quadrant will be a...

Latest Analog computers Reference Libraries

2010-09-16 16:09:47

A planisphere is a star chart analog, adjustable to display the visible stars for any time or and date, consisting of two adjustable disks that rotate on a common pivot. The Planisphere was pre-dated by the astrolabe; however, the planisphere was first described in the 11th century by Abu Rayhan al-Biruni. The name planishphere was not coined until 1624 by Jacob Bartsch, Johannes Kepler's son-in-law. A planisphere consists of a circular star chart attached at its center to an opaque...

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