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.

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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Word of the Day
  • A hairdresser.
The word 'friseur' comes from French friseur, from friser ("to curl, frizz").