Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
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Сторінка xii
... Sun. Its distance and magnitude . Copernican explanation of the Sun's apparent motion . Parallelism of the Earth's axis . The seasons . Heat received from the Sun in different parts of the orbit . Mean and true longitudes of the Sun ...
... Sun. Its distance and magnitude . Copernican explanation of the Sun's apparent motion . Parallelism of the Earth's axis . The seasons . Heat received from the Sun in different parts of the orbit . Mean and true longitudes of the Sun ...
Сторінка xiii
... Sun in accordance with these laws . Masses of the Earth and Sun compared . Density of the Sun. Force of gravity at its surface . Disturbing effect of the Sun on the Moon's motion CHAPTER IX . OF THE SOLAR SYSTEM . · 264 Apparent motions ...
... Sun in accordance with these laws . Masses of the Earth and Sun compared . Density of the Sun. Force of gravity at its surface . Disturbing effect of the Sun on the Moon's motion CHAPTER IX . OF THE SOLAR SYSTEM . · 264 Apparent motions ...
Сторінка 32
... sun's rays , and which lies above the visible horizon B R of B , it receives a twilight , which is strongest at R , the point immediately below which the sun is , and fades away gradually towards P , as the luminous part of the ...
... sun's rays , and which lies above the visible horizon B R of B , it receives a twilight , which is strongest at R , the point immediately below which the sun is , and fades away gradually towards P , as the luminous part of the ...
Сторінка 34
... sun , for instance , which at a considerable altitude always ap- pears round , assumes , as it approaches the horizon ... sun's cir- cumference equally raised by refraction , it would still appear circular , though displaced ; but the ...
... sun , for instance , which at a considerable altitude always ap- pears round , assumes , as it approaches the horizon ... sun's cir- cumference equally raised by refraction , it would still appear circular , though displaced ; but the ...
Сторінка 68
... sun , and as much depressed below the horizon as the sun is elevated above it , is not unfrequently noticed , the back of the spectator being turned to the sun's place . Occasionally , but much more rarely , the whole course of such a ...
... sun , and as much depressed below the horizon as the sun is elevated above it , is not unfrequently noticed , the back of the spectator being turned to the sun's place . Occasionally , but much more rarely , the whole course of such a ...
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Outlines of Astronomy John Frederick William Herschel,Sir John Frederick William Herschel Повний перегляд - 1851 |
Загальні терміни та фрази
angle angular appear apsides ascertained astronomical axis bright calculation celestial centre circle comet curve described diameter difference direction disc distance disturbed body disturbing force diurnal diurnal motion double stars earth ecliptic Edition effect elements ellipse epoch equal equator equinoctial equinox error exact excentricity fixed globe heavens heliocentric horizon inclination inequality instance instrument interval Jupiter latitude latter less light longitude lunar magnitude mass mean measure meridian moon moon's motion nearly nebula node normal force nutation object observed orbit parallax parallel perigee perihelion period perturbations planet planetary pole portion position Post 8vo precession proper motions proportion recede recess reckoned refraction respect result revolution right ascension rotation round satellites Saturn seen sidereal sidereal day sidereal period situation solar sphere spherical stars station sun's suppose surface syzygies tangential force telescope tion Uranus variation velocity visible vols whole Woodcuts zenith
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Сторінка 674 - A Dictionary of Science, Literature, and Art : Comprising the History, Description, and Scientific Principles of every Branch of Human Knowledge ; with the Derivation and Definition of all the Terms in General Use. Edited by WT BRANDE, FRSL and E.