 | Sidney Edwards Morse - 1822 - 706 pagine
...drawn from the centre of the body to the centre of the earth, makes a right angle with a line, drawn from the centre of the earth to the centre of the sun. Elongation. The greatest elongation of a heavenly body is its greatest apparent distance from the sun.... | |
 | John Farrar - 1827 - 456 pagine
...general views we may regard them as absolutely parallel. Then, if we suppose a straight line drawn from the centre of the earth to the centre of the sun, the plane perpendicular to this line, will separate the illuminated part of the earth's surface from... | |
 | 1834 - 574 pagine
...being a spheroid, the horizontal parallax under different latitudes will be different. Let M be the distance from the centre of the earth to the centre of the moon: R the equatorial radius of thre earth; then M sin. n = R, M sin. я- =r sin, n R : '" sin. т... | |
 | 1834 - 578 pagine
...being a spheroid, the horizontal parallax under different latitudes will be different. Let M be the distance from the centre of the earth to the centre of the moon : R the equatorial radius of the earth; then M sin. n = R, M sin. «• =r sin. n R ' sin. r '... | |
 | Denison Olmsted - 1841 - 486 pagine
...angles and one side, namely, the side AC ; hence, we have the means of finding the side CE, which is the distance from the centre of the earth to the centre of the moon. When the distance of a heavenly body is known, and we can measure, with instruments, its angular... | |
 | 1843 - 234 pagine
...moon appears so lar^e, compared with the sun, is, because it is three hundred times nearer to us. The distance from the centre of the earth, to the centre of the moon, is only two hundred and thirty-seven thousand miles; which is less than ten tim,es the earth's... | |
 | Robert Grant - 1852 - 686 pagine
...The second step in the reduction of a planetary observation, consists in transferring the position from the centre of the earth to the centre of the sun. This object is effected by means of the annual or heliocentric parallax. When once the absolute magnitude... | |
 | Denison Olmsted - 1855 - 484 pagine
...angles and one side, namely, the side AC ; hence, we have the means of finding the side CE, which is the distance from the centre of the earth to the centre of the moon. When the distance of a heavenly body is known, and we can measure, with instruments, its angular... | |
 | Smithsonian Institution. Board of Regents - 1858 - 452 pagine
...moon, which is represented here on a much smaller scale than that employed in our first figure. The distance from the centre of the earth to the centre of the moon is about sixty radii, or thirty diameters of the earth. The magnificent appendage of Saturn compares... | |
 | Denison Olmsted - 1858 - 454 pagine
...angles and one side, namely, the side AC ; hence, we have the means of finding the side CE, which is the distance from the centre of the earth to the centre of the moon. Fig. 20. When the distance of a heavenly body is known, and we can measure, with instruments,... | |
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CE, which is the distance from the centre of the earth to the centre of the moon. 
