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1982 Philip's Planisphere: Shows the Principal Stars Visible for Every Hour in the Year for Latitude 51.5 N, Canada, Northern Europe
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Description
Illustrated, Publishers' Original Binding, Very Scarce
A simple device for the recognition of the brightest stars and constellations seen from latitude 51.5 N.
A useful moveable guide to reading the stars, an invaluable aid for stargazers. The first planisphere is thought to have been made in 1624 by German astronomer Jacob Bartsch.
The days of the year are marked on the outer portion of the star chart, and hours of the day and night along the edge of the overlay. The stars visible at a particular date and time can be seen through the elliptical aperture in the overlay, by aligning the disk and the overlay accordingly.
To the rear of the planisphere are instructions for its use in English, French, German and Danish.
Constructed out of two rotating volvelles.
In exceptional condition.
Condition
Consisting of two rotating plastic volvelles. Externally, excellent. Rotating mechanism in full working order. Exceptionally bright to the reverse.
Fine
Delivery & payment
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