- a map of half or more of the celestial sphere with a device for indicating the part of a given location visible at a given time.
- a projection or representation of the whole or a part of a sphere on a plane.
Origin of planisphere
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for planisphere
Planisphere from Nineveh, and a table of lunar longitudes, 116-7.Assyria, Its Princes, Priests and People
A. H. (Archibald Henry) Sayce
It appears on the planisphere of Bartschius, published in 1624.Astronomical Curiosities
J. Ellard Gore
A planisphere that will show the planets costs about five dollars.
That sounds mysterious, but it is easy if you have a planisphere like ours.
If I had only a dollar or less to spend on astronomy I should buy a planisphere.
- a projection or representation of all or part of a sphere on a plane surface, such as a polar projection of the celestial sphere onto a chart
C14: from Medieval Latin plānisphaerium, from Latin plānus flat + Greek sphaira globe
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for planisphere
Online Etymology Dictionary, © 2010 Douglas Harper