Practical and Spherical Astronomy: For the Use Chiefly of Students in the Universities

aberration altitude angle assumed astronomers axis azimuth calculated centre chronometer circle coefficient colatitude collimation computed correction corresponding cos² cotan declination deduced determined difference dt dt dt dy earth ecliptic equal equation error of collimation error of level excentricity formula geocentric given Greenwich Greenwich mean Hence hour-angle inclination interval logarithms longitude and latitude mean solar meridian method moon moon's motion Nautical Almanac nearly node North Polar Distance nutation object obliquity observatory observed orbit P₁ perpendicular planet Point of Aries pole position precession quantity radius refraction right ascension sidereal sidereal day sin y sin sin z sin² sin³ solar parallax star sun's supposed surface tan² telescope tion transit transit-clock transit-instrument triangle true true anomaly velocity Venus vernal equinox vertical wires zenith distance zenith-distance µ³