 | John Brocklesby - 1872 - 374 pagine
...into two equal parts towards the east and west. For this reason this circle is called the merid1an circle, because when the sun, in his apparent diurnal...is also a circle, called the celestial equator, or equinoctia^ Thus, in Fig. 18, EQ is the equator, and E'Q1 the celestial equator. They appear as straight... | |
 | United States. Congress. House - 1885 - 558 pagine
...ten minutes of Greenwich mean time. Their geometric signification is as follows: — Let us imagine a plane passing through the centre of the earth, perpendicular to the right line joining the centres of the sun and moon. This latter line is the axis of the moon's shadow,... | |
 | United States Naval Observatory. Nautical Almanac Office - 1887 - 556 pagine
...minutes of Greenwich mea i time. Their geometric sig:iificatioii is as follows: — Let us imagine a plane passing through the centre of the earth, perpendicular to the right line joining the centres of the sun and moon This latter lire is the axis of the moon's shadow,... | |
 | 1895 - 578 pagine
...ten minutes of Greenwich mean time. Their geometric signification is as follows: — Let us imagine a plane passing through the centre of the earth, perpendicular to the right line joining the centres of the sun and moon. This latter line is the axis of the moon's shadow,... | |
 | 1898 - 580 pagine
...ten minutes of Greenwich mean time. Their geometric signification is as follows: — Let us imagine a plane passing through the centre of the earth, perpendicular to the right line joining the centres of the sun and moon. This latter line is the axis of the moon's shadow,... | |
 | Daniel Coit Gilman, Harry Thurston Peck, Frank Moore Colby - 1906 - 926 pagine
...call this the sensible horizon, distinguishing it from the rational horizon, ie the circle formed by a plane passing through the centre of the earth, perpendicular to the plumb-line, and produced to meet the heavens. (2) A term in geology, referring to a bed or beds which... | |
 | Daniel Coit Gilman, Harry Thurston Peck, Frank Moore Colby - 1909 - 956 pagine
...call this the sensible horizon, distinguishing it from the rational horizon, ie the circle formed by a plane passing through the centre of the earth, perpendicular to the plumb-line, and produced to meet the heavens. (2) A term in geology, referring to a bed or beds which... | |
 | United States Naval Observatory. Nautical Almanac Office - 1890 - 558 pagine
...ten minutes of Greenwich mean time. Their geometric signification is as follows: — Let us imagine a plane passing through the centre of the earth, perpendicular to the right line joining the centres of the sun and moon. This latter line is the axis of the moon's shadow,... | |
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... the sun. More Accurate Computations. — A more accurate determination of the phases as visible at any point of the earth's surface may be obtained from the Besselian elements which are given for every ten minutes of Greenwich mean time. Their geometric... 