declination vernier

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Solstice — For other uses, see Solstice (disambiguation). UTC date and time of solstices and equinoxes[1] year Equinox Mar Solstice June Equinox Sept Solstice Dec day time day time day time day time 2004 20 … Wikipedia
Setting circles — on an equatorial fork mounted telescope Setting circles are used on telescopes equipped with an equatorial mount to find astronomical objects in the sky by their equatorial coordinates often used in star charts or ephemeris … Wikipedia
Backstaff — Not to be confused with Ballastella. Davis quadrant from the beginning of the 18th century The backstaff or back quadrant is a navigational instrument that was used to measure the altitude of a celestial body, in particular the sun or moon. When… … Wikipedia
Measurement — (Roget s Thesaurus) < N PARAG:Measurement >N GRP: N 1 Sgm: N 1 measurement measurement admeasurement mensuration survey valuation appraisement assessment assize Sgm: N 1 estimate estimate estimation Sgm: N 1 dead reckoning … English dictionary for students
measurement — I (New American Roget s College Thesaurus) Determination of size Nouns 1. measurement, measure, admeasurement, mensuration, survey, valuation, appraisement, appraisal, metage, assessment, determination, assize, estimate, estimation; dead… … English dictionary for students

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