English planisphere, 1850-1886

Made:
1850-1886 in London
maker:
George Philip & Son
Philips large revolving planisphere, 20 diameter'

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Philips large revolving planisphere, 20 diameter'
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© The Board of Trustees of the Science Museum

Philips large revolving planisphere, 20" diameter

Dated to the middle of the nineteenth century, this planisphere was made by the London publishers, George Philip & Sons. The device made of paper and card, is a map of the heavens. It allows the user to display the appearance of the sky at any time of night or day throughout the year. The positions of the stars are plotted on a flat surface using the mathematical technique of stereographic projection. A round mask with a circular aperture covers the celestial map showing only those stars visible at the time and season indicated. The planisphere is also provided with a rule and circular scale on the round opening to indicate the elevation and direction of the stars shown.

Details

Category:
Astronomy
Object Number:
1916-326
Materials:
card, complete and paper
type:
planispheres
taxonomy:
  • disciplines
  • disciplines
  • science
  • natural sciences
  • physical sciences
credit:
Court, Thomas Henry