Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
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Сторінка 18
... angular diameter of the earth diminishes , being nowhere so great as 180 ° , or two right angles , but falling short of it by some sen- sible quantity , and that more and more the higher we ascend . The figure exhibits three states or ...
... angular diameter of the earth diminishes , being nowhere so great as 180 ° , or two right angles , but falling short of it by some sen- sible quantity , and that more and more the higher we ascend . The figure exhibits three states or ...
Сторінка 48
... angular velocity in pro- portion to their proximity ; the same distance of advance A B subtending a greater angle , APB = c P p , at the near object P than at the remote one Q. ( 69. ) A consequence of the familiar appearance we have ...
... angular velocity in pro- portion to their proximity ; the same distance of advance A B subtending a greater angle , APB = c P p , at the near object P than at the remote one Q. ( 69. ) A consequence of the familiar appearance we have ...
Сторінка 49
... angular motion of an object , arising from a change of our point of view , is called in general paral- lax , and it is always expressed by the angle A P B subtended at the object P ( see fig . of art . 68. ) by a line joining the two ...
... angular motion of an object , arising from a change of our point of view , is called in general paral- lax , and it is always expressed by the angle A P B subtended at the object P ( see fig . of art . 68. ) by a line joining the two ...
Сторінка 58
... angular distance from the equator , measured on its own terrestrial meridian : it is reckoned in degrees , minutes , and seconds , from 0 up to 90 ° , and northwards or southwards ac- cording to the hemisphere the place lies in . Thus ...
... angular distance from the equator , measured on its own terrestrial meridian : it is reckoned in degrees , minutes , and seconds , from 0 up to 90 ° , and northwards or southwards ac- cording to the hemisphere the place lies in . Thus ...
Сторінка 59
... angular measure we shall invariably adhere to the distinct system of notation here adopted ( ° ' " , and h . m . s . ) . Great confusion sometimes arises from the practice of using the same marks for both . 66 ° 32 ' . We say about ...
... angular measure we shall invariably adhere to the distinct system of notation here adopted ( ° ' " , and h . m . s . ) . Great confusion sometimes arises from the practice of using the same marks for both . 66 ° 32 ' . We say about ...
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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.