Description: Museum worthy piece: A Movable Planisphere of the Heavens at Every Minute by Henry Whitall, Philadelphia: 1869 Hand-colored circular planisphere Printed paper on cardboard, each with a central turning disk, some varnished 15 inches diameter Round planisphere inside the paper shows the constellations as mythological figures in full color. A planisphere is a portable device designed to aid in the study of stars and constellations visible in the night sky at any given date and time, generally for a particular locale. It consists of an outer rotating card with cutouts set against an inner hemispheric celestial map. The disk is rotated to match up the hour and minute of the day and compass points to printed data of day and month on the edge of the inner map, revealing the visible constellations within the cutout area. The disk is sometimes referred to by the antiquated word volvelle, used to describe rotating disks on various calculating devices.
Price: 1500 USD
Location: Richmond, Indiana
End Time: 2024-09-16T03:45:40.000Z
Shipping Cost: 0 USD
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