Smith's Illustrated Astronomy: Designed for the Use of the Public Or Common Schools in the United States ...

Nichols & Hall, 1868 - 79 σελίδες

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Σελίδα 64 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds.
Σελίδα 11 - The squares of the periods of revolution of any two planets are proportional to the cubes of their mean distances from the sun.
Σελίδα 47 - Astrcea, the goddess of justice, who lived upon the earth during the golden age : but being offended at the wickedness and impiety of mankind during the brazen and iron ages of the world, she returned to heaven, and was placed among the constellations of the zodiac, with a pair of scales (Libra) in one hand and a sword in the other.
Σελίδα 13 - And even should an accumulation of disturbances, of which the absence of inequalities lessens the probability, bring the rings together, the velocities at the point of contact will be very nearly equal, and the two will coalesce without disastrous consequences." " If, in its normal condition, the ring has but one division, as is commonly seen, under peculiar circumstances it might be anticipated that the preservation of their equilibrium would require a separation in some regions of either the inner...
Σελίδα 63 - Find the longitude of the given place on the equator, bring it to that part of the brass meridian which is numbered from the equator towards the poles ; and then, under the given latitude, on the brass meridian, you will find the place required.
Σελίδα 63 - ... latitude and longitude of a star* RULE. Place the upper end of the quadrant of altitude on the north or south pole of the ecliptic, according as the star is on the north or south side of the ecliptic, and move the other end till the...
Σελίδα 51 - Mercury gave to Orpheus, and upon which he played with such a masterly hand, that even the most rapid rivers ceased to flow, the wild beasts of the forest forgot their wildness, and the mountains came to listen to his song. Of...
Σελίδα 63 - Problem 12 : ihen elevate the pole as many degrees above the horizon as are equal to the latitude of that place, and bring it to the brass meridian ; so will it then be the zenith or centre of the horizon.
Σελίδα 62 - Sun's place for the given day to the brass meridian; mark its declination) bring the given place to the brass meridian, and set the index to the...
Σελίδα 63 - Look for the given day in the circle of months on the horizon, against which, in the circle of signs, are the sign and degree in which the sun is for. that day. Find the same sign and degree in the ecliptic on the surface of the globe ; bring the degree of the ecliptic, thus found, to that part of the brass meridian which is numbered from the equator towards the poles ; its distance from the equator reckoned on the brass meridian, is the sun's declination.

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