Taking the differences of right ascension and declination between a comet and a star, the position of which has been already determined.
·adj Of or pertaining to a differential, or to differentials. II. Differential ·noun An increment, ...
Webster's Dictionary of the English Language
·noun The information so acquired. II. Observation ·noun Performance of what is prescribed; adheren...
In nautical astronomy, denotes the taking the sun, moon, or stars' altitude with a quadrant or sexta...
The Sailor's Word-Book
·add. ·- A railway passenger car made so as to facilitate seeing the scenery en route; a car open, o...
The latitude determined by observations of the sun, star, or moon, by meridional, as also by double ...
Reducing the altitudes or distances of heavenly bodies by calculation. ...
The longitude calculated by observing the moon's angular distance from the sun or a fixed star. It i...