- 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
That sounds mysterious, but it is easy if you have a planisphere like ours.
A planisphere that will show the planets costs about five dollars.
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