The Planetarium, and Astronomical Calculator ... |
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Page 22
... angle of its obliquity is 5 degrees and 20 minutes . The Moon has scarcely any difference of seasons , be- cause her axis is nearly perpendicular to the ecliptic , and consequently the Sun never removes sensibly from her equator . The ...
... angle of its obliquity is 5 degrees and 20 minutes . The Moon has scarcely any difference of seasons , be- cause her axis is nearly perpendicular to the ecliptic , and consequently the Sun never removes sensibly from her equator . The ...
Page 27
... angle of about 35 degrees , which is nearly five times greater than the inclination of Mercury . From the eccentricity of Pallas being greater than that of Ceres , or from a difference of position in the line of their apsides , where ...
... angle of about 35 degrees , which is nearly five times greater than the inclination of Mercury . From the eccentricity of Pallas being greater than that of Ceres , or from a difference of position in the line of their apsides , where ...
Page 29
... angles under which these satellites are seen from the earth , as its mean distance from Jupiter , are as follow : -The first three minutes and 55 seconds : the second six minutes and 15 seconds : the third 9 minutes and 58 seconds , and ...
... angles under which these satellites are seen from the earth , as its mean distance from Jupiter , are as follow : -The first three minutes and 55 seconds : the second six minutes and 15 seconds : the third 9 minutes and 58 seconds , and ...
Page 30
... angles to the plane of the ring . In Plate 3d , fig . 12 , the ring is represented very obliquely to the view of the observer . It is inclined 30 degrees to the ecliptic , and is about 21 thousand miles in breadth ; which is equal to ...
... angles to the plane of the ring . In Plate 3d , fig . 12 , the ring is represented very obliquely to the view of the observer . It is inclined 30 degrees to the ecliptic , and is about 21 thousand miles in breadth ; which is equal to ...
Page 32
... Angle which it subtends when seen at the mean M. S. distance of the planet . 7 25 ON HERSCHEL , OR URANUS . From inequalities in the motion of Jupiter and Saturn , for which no rational account could be given , and from the mutual ...
... Angle which it subtends when seen at the mean M. S. distance of the planet . 7 25 ON HERSCHEL , OR URANUS . From inequalities in the motion of Jupiter and Saturn , for which no rational account could be given , and from the mutual ...
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Common terms and phrases
angle aphelion apogee apparent diameter appear Aries ascending node Astronomers attractive power axis celestial bodies centrifugal force circle Comets conjunction constellation diameter as seen difference disk diurnal diurnal motion earth earth's shadow equal equator equinox fall fixed stars full Moon Geocentric Geocentric longitude given globe gravity half Heavens heliocentric Herschel horary motion horizon horizontal parallax inferior conjunction Jupiter light London longitude lunations mean motion Mean new Moon Mercury meridian Middle apparent minutes Moon in March Moon's mean anomaly Moon's node Moon's orbit move nearer nearest north pole Old Style opposite parallax penumbra perigee perihelion planet projectile force rays revolve right ascension rise round the Sun satellites Saturn seconds semidiameter slow of clock Solar System south pole subtract Sun and Moon Sun fast Sun slow Sun's distance Sun's mean anomaly Sun's mean distance Sun's true surface syzygy tance telescope tides tion Venus
Popular passages
Page 200 - 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 80 - On the parallel of London, as much of the ecliptic rises about Pisces and Aries in two hours, as the moon goes through in six days ; therefore...
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 221 - Rectify the globe for the latitude of the place, find the sun's place in the ecliptic and bring it to the brass meridian, and set the index of the hour circle to 12.
Page 32 - 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 23 - Its mean distance from the sun is about 253 millions of miles; its revolution is completed in 4 years and 130 days, and its diameter is computed to be about 1425 miles. It is free from the nebulosity which surrounds Pallas, and is distinguished from all the other planets by the great eccentricity of its orbit; being at its least distance from the sun only 189 millions of miles, and at its greatest distance, 316 millions. — Vesta was discovered by Dr. Olbers on the 29th March, 1807. It appears like...
Page 219 - X.) and bring it to the meridian, and set the index to 12 ; bring the sun's place to the eastern edge of the horizon, and the index will show the...
Page 34 - Earth were actually to receive a shock from one of these bodies, " having any considerable density," the consequences would indeed be awful. A new direction would be given to its rotary motion, and it would revolve around a new axis. The seas, forsaking their beds, would be hurried, by their centrifugal force, to the new equatorial regions ; islands and continents, the abodes of men and animals, would be covered by the universal rush of the waters to the new equator, and every vestige of human industry...
Page 92 - Differences of local situation cause great differences as to the height to which the tide rises. In the central parts of the ocean the height is comparatively small, seldom exceeding three feet, but in rushing up contracted channels the...
Page 10 - ... 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...