Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
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Сторінка 217
... perihelion of its orbit ; M the farthest , or the aphelion ; and therefore ASM the aris of the ellipse . Now , suppose the orbit divided into two segments by a straight line PSQ , drawn through the sun , and anyhow situated as to ...
... perihelion of its orbit ; M the farthest , or the aphelion ; and therefore ASM the aris of the ellipse . Now , suppose the orbit divided into two segments by a straight line PSQ , drawn through the sun , and anyhow situated as to ...
Сторінка 221
... perihelion , in the year 1800 was 99 ° 30 ′ 5 ′ : we say in the year 1800 , because , in point of fact , by the operation of causes hereafter to be explained , its position is subject to an extremely slow variation of about 12 " per ...
... perihelion , in the year 1800 was 99 ° 30 ′ 5 ′ : we say in the year 1800 , because , in point of fact , by the operation of causes hereafter to be explained , its position is subject to an extremely slow variation of about 12 " per ...
Сторінка 222
... perihelion , then will the angle A SP at first increase more rapidly than the mean longitude , and will , therefore , during the whole semi - revolution from A to M , exceed it in amount ; or , in other words , the true place will be in ...
... perihelion , then will the angle A SP at first increase more rapidly than the mean longitude , and will , therefore , during the whole semi - revolution from A to M , exceed it in amount ; or , in other words , the true place will be in ...
Сторінка 226
... perihelion , has completed one sidereal period , the perihelion will have moved forward by 11 " -8 , which arc must be described by the earth before it can again reach the perihelion . In so doing , it occupies 4m 39.7 and this must ...
... perihelion , has completed one sidereal period , the perihelion will have moved forward by 11 " -8 , which arc must be described by the earth before it can again reach the perihelion . In so doing , it occupies 4m 39.7 and this must ...
Сторінка 303
... perihelion , or at any other precisely determined point of its orbit , and its whole period ; for these being known , the law of the areas determines the place at every other instant . This moment is called ( when the perihelion is the ...
... perihelion , or at any other precisely determined point of its orbit , and its whole period ; for these being known , the law of the areas determines the place at every other instant . This moment is called ( when the perihelion is the ...
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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.