## Astronomical Tables and Formulæ Together with a Variety of Problems Explanatory of Their Use and Application: To which are Prefixed the Elements of the Solar System ...R. Taylor, 1827 - 267 pages |

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### Common terms and phrases

annual apparent diameter apsides Ascension and Declination assumed equal barometer centre Ceres commencement computing considered as unity correction coversin deduced degree denotes determined Diff difference earth being considered eccentricity ecliptic Equal Altitudes equation of Equal equinoxes Fahr formula given angle given side greatest equation Greenwich h m h m half the major horizontal parallax hour angle Interval Log Jupiter Laplace latitude logarithms lunar major axis mean anomaly mean distance mean longitude mean motion mean sidereal revolution mean solar days mean synodical revolution meridian moon's node motion in 365 nearly nutation Obliq obliquity observations orbit is inclined Pallas Jupiter pendulum perihelion phænomenon planet Pole precession present century quantities refraction retrograde retrograde motion Right Ascension satellites Saturn Saturn Uranus secular variation semidiameter sexagesimal sin² solar nutation solstice sun considered sun's syzigies Table telescope thermometer tion true longitude Uranus Vesta Juno Ceres zenith distance

### Popular passages

Page 20 - from two causes: 1° the unequal motion of the earth in its orbit; 2° the obliquity of that orbit to the plane of the equator. The mean and apparent solar days are never equal, except when the sun's daily motion in right ascension is equal to 59'. 8",33.

Page 31 - Its orbit is inclined to the plane of the ecliptic, in an angle of 7°. 8'. 9": which, according to M. Santini, has an annual decrease of 0", 12. Its ascending node -was, on January 1, 1820, in 103°. 13'.

Page 6 - to the times employed in describing them. 3°. The squares of the times of the sidereal revolutions of the planets are to each other as the cubes of their mean distances. the

Page 6 - 1°. The orbit of each planet is an ellipse; of which the sun occupies one of the foci. 2°. The areas described about the sun, by the radius vector of the planet, are proportional to the times employed in describing them.

Page 45 - the same time as the tropical revolution in her orbit: whence she always presents nearly the same face to the earth. But, as the motion of the moon, in her orbit, is periodically variable, we sometimes see more of her eastern edge, and sometimes more of her western edge. This appearance is called

Page 41 - The squares of the times of the revolutions of the satellites, round their respective primary planets, are to each other as the cubes of their mean distances from the

Page 7 - The radius vector is an imaginary line drawn from the centre of the sun, to the centre of the planet, in any part of its orbit. The

Page 76 - L = the Latitude of the place of observation: (minus, when South) D = the Declination, at the time of noon, on the given day: (minus, when South) 8 = the double daily variation in the declination, deduced from the noon of the preceding day to the noon of the following day : (minus, when the sun is

Page 55 - that, for a great number of years at least, the first three satellites cannot be eclipsed at the same time. For, in the simultaneous eclipses of the second and third, the first will always be in conjunction with Jupiter : and vice versa.

Page 55 - of the second. And the mean sidereal or synodical longitude of the first, minus three times that of the second, plus twice that of the third, is