Planisphaerium

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This is an old revision of this page, as edited by Salix alba (talk | contribs) at 22:20, 27 September 2008 (Category:Ancient Greek mathematical works (I guess he wrote in Ancient Greek )). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

"Planisphaerium" can also refer to an album by Wormed.

The Planisphaerium was a work by Ptolemy in which he explored the mathematics of mapping figures inscribed in the celestial sphere onto a plane by stereographic projection, a method of projection that preserves the properties of circles. The work would be instrumental in the use of plane astrolabes.

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