Sterrewacht (heliometergebouw), Leiden

Sterrewacht (heliometergebouw), Leiden

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Building for the heliometer ( P. Cuypers 1876 ) A heliometer is an instrument designed for measuring the variations of the sun's diameter at different seasons of the year. The financers of the Dutch expedition for the 1874 transit on Reunion bought a heliometer especially for this occassion. After the expedition the heliometer was donated to the Leiden Observatory who built this tower for it. However, the instrument was never used anymore. The heliometer is now at the museum Boerhaave in Leiden. #astronomie #cosmos #De_Sitter #Ehrenfest #Einstein #galaxy #hemel #Kaiser #Kaiserstraat #Lorenz #Merz_1873 #Oort #sterrenwacht #universe #zonnemeter
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