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Heliostat, c 1752

Heliostat, c 1752
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Not available to clients invoiced in the UK
Largest available format 3504 × 2806 px 1 MB
Dimension [pixels] Dimension in 300dpi [mm] File size [MB] Online Purchase
Large 3504 × 2806 px 297 × 238 mm 1.0 MB
Medium 1024 × 820 px 87 × 69 mm 903 KB

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IMAGE number
UIS5061208
Image title
Heliostat, c 1752
Auto-translated text View Original Source
Artist
Unknown
Location
Science Museum, London, UK
Medium
object
Image description

Heliostat, c 1752. A heliostat keeps the rays of the Sun in one direction during solar observation. This instrument was attached to the front of a telescope. The Sun's rays were reflected from the lower mirror to the upper fixed mirror from where they were reflected down the telescope tube. The angle of the lower mirror was set for the latitude, and was rotated by hand to compensate for the movement of the Sun. This instrument was made by Jeremiah Sisson, and is associated with Dr Stephen Demainbray (1710-1782), the famous 18th century lecturer. ©SSPL/Science Museum

Photo credit
SSPL/UIG / Bridgeman Images
Image keywords
astronomy / astronomy / Science

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