The Planetarium and Astronomical Calculator |
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Common terms and phrases
angle apogee approach of centres Aries ascending node Astronomers attractive power body calculated called centrifugal force Ceres circle Comets conjunction consequently daily motion descending diameter as seen difference Dionysian Period discovered earth Earth's shadow enter Table equal equator equinox fall fixed stars full Moon Geocentric longitude gravity greatest grees half Heavens heliocentric Herschel horary motion horizon Jupiter light lunar Mars mean anomaly mean motion mean new Moon meridian Middle apparent millions of miles minutes Moon in March Moon's latitude Moon's mean Moon's nodes Moon's orbit move nearer north pole observer Old Style opposite penumbra performs a revolution perigee perihelion period Pisces planet projectile force rays revolves rise round the Sun satellites Saturn seconds semi-diameter signs and degrees Solar System south pole subtract Sun and Moon Sun appears Sun's distance Sun's mean distance Sun's true surface syzygy tance telescope Tides tion tropic velocity Venus visible
Popular passages
Page 248 - Aries the Ram, Taurus the Bull, Gemini the Twins, Cancer the Crab, Leo the Lion, Virgo the Virgin, Libra the Balance, Scorpio the Scorpion, Sagittarius the Archer, Capricornus the Goat, Aquarius the Waterbearer, and Pisces the Fishes...
Page 12 - Vast concave ! ample dome ! wast thou design'd A meet apartment for the Deity ? — •Not so; that thought alone thy state impairs, Thy lofty sinks, and shallows thy profound, And straitens thy diffusive ; dwarfs the whole, And makes a universe an orrery.
Page 253 - Equinox fall on the 21st of March, as it did at the time of that council. And to prevent the like variation for the future, he ordered that, three days...
Page 12 - Thousands of thousands of suns, multiplied without end, and ranged all around us, at immense distances from each other, attended by ten thousand times ten thousand worlds, all in rapid motion, yet calm, regular, and harmonious, invariably keeping the paths prescribed them ; and these worlds peopled with myriads of intelligent beings, formed for endless progression in perfection and felicity.
Page 41 - After the lapse of years, we perceive it again returning to our system, and tracing a portion of the same orbit round the sun, which it had formerly described.
Page 9 - ... by their influences. Whoever imagines that they were created only to give a faint glimmering light to the inhabitants of this globe, must have a very superficial knowledge of Astronomy, and a mean opinion of the Divine Wisdom...
Page 117 - Moon, °.jthe,. is extended as far as the Earth ; and draws the wa- cov^red'by tcrs under the torrid zone, acting upon places where KEPLER. it is vertical, insensibly on confined seas and bays, but sensibly on the ocean, whose beds are large, and the waters have the liberty of reciprocation ; that is, of rising and falling.
Page 104 - ... so as to bestow more or less light on all parts of the earth, as their several circumstances and seasons render it more or less serviceable. About the equator, where there is no variety of seasons, and the weather...
Page 11 - ... so that if the remoter planets have the sun's light fainter by day than we, they have an addition made to it morning and evening by one or more of their moons, and a greater quantity of light in the night time.