A Manual of Spherical and Practical Astronomy: Embracing the General Problems of Spherical Astronomy, the Special Applications to Nautical Astronomy, and the Theory and Use of Fixed and Portable Astronomical Instruments, with an Appendix on the Method of Least Squares, Volume 1 |
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Common terms and phrases
aberration altitude approximate ascension and declination assumed axis azimuth BESSEL celestial celestial sphere centre chronometer clock correction co-ordinates computed constant Corr corresponding cos² curve d₁ deduced denote determine Diff difference diurnal motion earth eclipse employed Ephemeris equations of condition equinox expressed formula geocentric given gives Greenwich Greenwich mean h₁ hence horizon hour angle instant interpolation interval latitude limb logarithms longitude mean meridian method moon moon's noon nutation obtain P₁ parallax place of observation plane pole position precession prime vertical probable error proper motion quantity radius reduced refraction right ascension semidiameter sextant sidereal sin² solar solar eclipse sphere star star's substitute sun's T₁ term tion transit triangle true whence zenith distance Δα