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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
Other 51Թ Forms
- heliometric adjective
- heliometrical adjective
- heliometrically adverb
- ˌˈdzٰ noun
- ˌˈٰ adverb
51Թ History and Origins
Origin of heliometer1
Example Sentences
Double-Image Micrometers with Divided Lenses.—Various micrometers have been invented besides the heliometer for measuring by double image.
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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