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heliometer
[ hee-lee-om-i-ter ]
noun
- a telescope with a divided, adjustable objective, formerly used to measure small angular distances, as those between celestial bodies.
heliometer
/ ˌhiːlɪəʊˈmɛtrɪk; ˌhiːlɪˈɒmɪtə /
noun
- a refracting telescope having a split objective lens that is used to determine very small angular distances between celestial bodies
Derived Forms
- ˌˈdzٰ, noun
- ˌˈٰ, adverb
- heliometric, adjective
Other yvlog Forms
- ···· [hee-lee-, uh, -, me, -trik], l··۾· adjective
- l··۾··ly adverb
yvlog History and Origins
Origin of heliometer1
Example Sentences
Nor is it difficult to imagine the probable course of reasoning which led Bessel to select the model of his new heliometer.
His instrument was the heliometer, originally designed for measuring the sun's diameter; but as modified for parallax work it is the most accurate of all angle-measuring instruments that the astronomers employ.
They are obtained from late improved measures of the velocity of light, and from measures by the heliometer.
A heliometer is the most accurate astronomical instrument for relative measurements of position, as a transit circle is the most accurate for absolute determinations.
A detailed examination convinced the Astronomer-Royal of its superior accuracy to Bessel's result with the heliometer.
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