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Heliometer   Listen
Heliometer

noun
1.
An instrument used to measure the angular separation of two stars that are too far apart to be included in the field of view of an ordinary telescope.





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"Heliometer" Quotes from Famous Books



... here selected for tracing the progress of accurate measurement. But there is one instrument of great value, the heliometer, which is not used at Greenwich. This serves the purpose of a double image micrometer, and is made by dividing the object-glass of a telescope along a diameter. Each half is mounted so as to slide a distance of several inches each way ...
— History of Astronomy • George Forbes


Words linked to "Heliometer" :   measuring instrument, measuring device, measuring system


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