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1 to 5 of 227 glossary terms
accessory: used here to refer to any associated parts of an instrument such as tripod base and legs.
age of the moon: number of days that have passed since the previous new moon.
alidade: straight rule with sights. An alidade could be used for surveying with a plane table but it also appears in a different form as part of an astrolabe.
almucantars: lines of equal altitude on a projection of the heavens based on the local horizon.
altazimuth theodolite: theodolite for measuring altitude and azimuth simultaneously, see article on the theodolite.
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