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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How To Use heliometer In A Sentence

  • After the expedition the heliometer was donated to the Observatory who built a tower for it.
  • And so, the phenomenon in 1882 was observed by cameras held by the French and the Americans, and timings were measured with the help of heliometers in most European organizations.
  • The heliometer is shown on display at the Science Museum in London.
  • He also determined the distances, using the heliometer, of twenty of the brighter and nearer Southern stars.
  • A heliometer is a refractor, with the objective cut in two, which was used to measure small angular distances.
  • Here he constructed the famous "Dorpat refractor" for Struve, which is still at work; and designed the "K√∂nigsberg heliometer" for Bessel. Pioneers of Science
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