The plane of the ecliptic is inclined to the plane of the equator at an angle of 23°27'8'-26 which is very slowly decreasing. The angle is called the obliquity of the ecliptic. Surveyor 1 and C - Page 311by United States. Bureau of Naval Personnel - 1955 - 380 pagesFull view - About this book
| Samuel Butler - 1855 - 292 pages
...sK\styeis, or eclipses of the sun and moon, can only take place when the moon is in or near that circle. f The plane of the Ecliptic is inclined to the plane of the Equator at an angle of about 23° 30'. Hence when the sun has reached its northernmost point, it is vertical 23° 30' North of the... | |
| James Clyde - Geography - 1859 - 478 pages
...off the perpendicular to the plane of its orbit ; in other worda, that the plane of the earth's orbit is inclined to the plane of the equator at an angle of 23° 28'. Let the north pole of a globe be depressed nearly 23£ degrees, the plane of the wooden horizon... | |
| James Clyde - Geography - 1866 - 512 pages
...off the perpendicular to the plane of its orbit ; in other words, that the plane of the earth's orbit is inclined to the plane of the equator at an angle of 23° 28'. Let the north pole of a globe be depressed nearly 23£ degrees, the plane of the wooden horizon... | |
| Denison Olmsted - Astronomy - 1872 - 250 pages
...observations to lie in a plane, cutting the celestial sphere in a circle called the ecliptic (Art. 12), and inclined to the plane of the equator at an angle of about 23° 27'. This plane maintains almost a constant position among the stars, and is used far more than... | |
| Robert Stawell Ball - Astronomy - 1880 - 488 pages
...ecliptic is the great circle AB c D, which intersects the equator in the points AC, called the Equinoxes. The plane of the ecliptic is inclined to the plane of the equator by an angle which is called the Obliquity of the Ecliptic, and is equal Astronomy. situated at the... | |
| National cyclopaedia - 1884 - 626 pages
...great circle, and that the circle thus determined remains almost exactly the same for year after year. The plane of the ecliptic is inclined to the plane of the equator at an angle termed the obliquity of the ecliptic. Its mean value on 1st January, 1885, is 23° 27' 15-17". The... | |
| Stewart W. and co - 1884 - 170 pages
...Zones respectively. 6. ECLIPTIC. 90. The plane of the earth's orbit, as will be hereafter explained, is inclined to the plane of the equator at an angle of 28J degrees. If, therefore, we draw a line cutting the equator at that angle, it will meet the tropics... | |
| John Thornton (M.A.) - Astronomy - 1890 - 372 pages
...these points are called the tropics, because the sun there turns towards the equator again. At present the plane of the ecliptic is inclined to the plane of the equator at an angle of about 23^. But this angle is less by about 24' than it was 2,000 years ago, and is still decreasing. Its... | |
| Municipal government - 1915 - 692 pages
...ascends above this plane and falls below it within a range of 10° 16'. The plane of the ecliptic again is inclined to the plane of the equator at an angle of 23° 27', so that the moon's position north and south of the equator will vary from a maximum of 28°... | |
| Frank Cole Stebbing - Nautical astronomy - 1903 - 364 pages
...ecliptic, on the celestial concave. Def. 49. The, Obliquity of the Ecliptic is the angle, at which the plane of the ecliptic is inclined to the plane of the celestial equator. It has been found by observation to be about 23° 27'. p The earth is not exactly... | |
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