The Planetarium and Astronomical Calculator |
From inside the book
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Page 149
Tobias Ostrander. completed its 77th periodical return , and the shadow of the Moon leaves the earth at the south pole to re- turn no more , until the lapse of 12492 years . But on account of the true , ( or unequable ) motions of the Sun , ...
Tobias Ostrander. completed its 77th periodical return , and the shadow of the Moon leaves the earth at the south pole to re- turn no more , until the lapse of 12492 years . But on account of the true , ( or unequable ) motions of the Sun , ...
Page 153
... Moon when totally eclipsed , ( though a dark opaque body , and shines only ... true cause of her being visible , is the scattered beams of the Sun , bent ... Moon goes through the centre of the earth's shadow , she is directly ...
... Moon when totally eclipsed , ( though a dark opaque body , and shines only ... true cause of her being visible , is the scattered beams of the Sun , bent ... Moon goes through the centre of the earth's shadow , she is directly ...
Page 156
... Moon and nodes the same in every part of their orbits ? How can the mean time of these conjunctions be re- duced to the true ? How many are the greatest number of Eclipses that can possibly happen in one year ? How many the least ? What ...
... Moon and nodes the same in every part of their orbits ? How can the mean time of these conjunctions be re- duced to the true ? How many are the greatest number of Eclipses that can possibly happen in one year ? How many the least ? What ...
Page 160
... Moon from any point of its orbit , is reckoned in Signs , Degrees , Minutes ... Moon from its apogee at any given time , is called its mean anomaly ... true . The mean place of the Sun or Moon is always for- warder than the true ...
... Moon from any point of its orbit , is reckoned in Signs , Degrees , Minutes ... Moon from its apogee at any given time , is called its mean anomaly ... true . The mean place of the Sun or Moon is always for- warder than the true ...
Page 167
... true , whilst the anomaly is less than 6 signs ; and their true places more forward than their mean , when the anom- aly is more . Hence it is evident , that whilst the Sun's anomaly is less than 9 signs , the moon will overtake him ...
... true , whilst the anomaly is less than 6 signs ; and their true places more forward than their mean , when the anom- aly is more . Hence it is evident , that whilst the Sun's anomaly is less than 9 signs , the moon will overtake him ...
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Common terms and phrases
angle apogee approach of centres Aries ascending node Astronomers attractive power body calculated centrifugal force Comets conjunction consequently descending diameter as seen difference Dominical letters earth Earth's shadow enter Table equal equator equinox fall fixed stars full Moon Geocentric longitude given gravity greatest grees H M. S. half Heavens heliocentric Herschel horary motion horizon Interrogations for Section Jupiter light longitude lunar Lunar Eclipses mean motion mean new Moon Middle apparent millions of miles minutes Moon in March Moon's mean anomaly Moon's node Moon's orbit Moon's true move nearer north pole Old Style opposite parallax penumbra performs a revolution perigee 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's distance Sun's mean anomaly Sun's mean distance Sun's true surface syzygy tance telescope Tides tion velocity Venus visible