An Introduction to the Elements of Practical Astronomy

Aldebaran Almanac altitude and azimuth amount angle angular distance apparent noon Aquarii Arietis azimuth instrument called celestial body celestial equator celestial sphere course declination determination deviation difference direction diurnal motion Eclipse Reapp elapsed equal equator equator art find the latitude find the longitude fixed stars formula Greenwich mean heavenly bodies heavens horizon horizontal parallax instant Jupiter Leonis line of collimation local mean longitude lunar distance mean noon mean solar interval measured middle wire minutes and seconds moon moon's bright limb moon's centre November obtain orbit parallel pass the meridian perpendicular Piscium place of observation point of Aries polar distance pole position prime vertical radius ray of light refraction Regulus Right Ascension rotation satellite semidiameter sidereal day sidereal interval solstice subtracted sun's centre surface Table Tauri telescope terrestrial tion transit true distance values vernal equinox vernier vertical circle vertical plane zenith distance