Elements of Astronomy, with Numerous Examples and Examination Papers

aberration angle subtended angular distance annual parallax apparent diameter axis calculate called celestial equator celestial pole celestial sphere centre circular clock coincide colat comets complete revolution corresponding crosses the meridian determined direction disc diurnal motion Dublin earth's orbit ecliptic ecliptic limit equal equator equinox error fixed stars greatest Greenwich heavenly bodies heavens Hence horizon horizontal parallax inferior conjunction inferior planet interval Jupiter known latitude light line of collimation longitude lunar eclipse Mars mean noon mean solar mean sun measured Mercury meridian altitude method miles moon moon's move Nautical Almanac nearly node observer opposite parallax parallel perpendicular point of Aries position precession radius rays refraction represent revolve round right angles right ascension rotation round the sun satellites seen shadow sidereal hours solstice spider line sun's declination superior planet synodic period telescope transit twilight velocity Venus vertical zenith distance