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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 51Թ Forms
- ···· [hee-lee-, uh, -, me, -trik], l··۾· adjective
- l··۾··ly adverb
51Թ History and Origins
Origin of heliometer1
Example Sentences
An arrangement, afterwards described, has been fitted in modern heliometers for placing the screen in front of either segment by a handle at the eye-end.
The inner corona had first been recorded photographically on a daguerreotype plate during the eclipse of 1851, but the lens belonged to a heliometer, and was of course uncorrected for the photographic rays.
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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