heliometer meaning in Hindi

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He also invented a heliometer, afterwards perfected by Joseph von Fraunhofer.
Both parties used a specially designed heliometer for this purpose.
Jean-Charles Houzeau invented in 1871 a heliometer with unequal focal lengths.
The two expeditions each had an identical copy of Houzeau's heliometer.
He also measured star distances with heliometers.
He perfected the use of the heliometer.
The star was 61 Cygni, and he used a heliometer designed by Joseph von Fraunhofer.
He was educated at Warsaw University and his thesis was on " reduction constants of the Repsold heliometer ".
When Phoebe makes herself known to Max, she learns that Max came to steal Dr . Minyak's Heliometer.
The first successful measurements of stellar parallax were made by Friedrich Bessel in 1838 for the star 61 Cygni using a heliometer.

noun.

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