The Planetarium and Astronomical Calculator |
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Common terms and phrases
30 minutes angle apogee approach of centres Aries ascending node Astronomers attractive power body calculated centrifugal force Comets conjunction consequently descending diameter as seen difference Dionysian Period Dominical letters earth Earth's shadow enter Table equal equator equinox fall fixed stars full Moon Geocentric longitude given Golden Number gravity greatest grees half Heavens Herschel horary motion horizon Interrogations for Section Jupiter light longitude lunar Lunar Eclipses mean anomaly mean motion mean new Moon Middle apparent millions of miles Moon in March Moon's latitude Moon's node Moon's orbit Moon's true move nearer north pole Old Style opposite parallax penumbra perigee planet projectile force rays Required the true revolves rise round the Sun satellites Saturn SDMS seconds semi-diameter signs and degrees Solar System south pole subtract Sun and Moon Sun's distance Sun's mean distance surface syzygy tance telescope Tides tion velocity Venus visible