Definition of heliometer in English:
heliometer
noun ˌhiːlɪˈɒmɪtəˌhiliˈɑmədər
Astronomy A refracting telescope with a split objective lens, used for finding the angular distance between two stars.
Example sentencesExamples
- A heliometer is a refractor, with the objective cut in two, which was used to measure small angular distances.
- 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.
- After the expedition the heliometer was donated to the Observatory who built a tower for it.
Origin
Mid 18th century: from helio- 'of the sun' + -meter (because it was originally used for measuring the diameter of the sun).
Definition of heliometer in US English:
heliometer
nounˌhēlēˈämədərˌhiliˈɑmədər
Astronomy A refracting telescope with a split objective lens, used for finding the angular distance between two stars.
Example sentencesExamples
- 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.
- After the expedition the heliometer was donated to the Observatory who built a tower for it.
- 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.
Origin
Mid 18th century: from helio- ‘of the sun’ + -meter (because it was originally used for measuring the diameter of the sun).