Outlines of AstronomyBlanchard & Lea, 1856 - 557 стор. |
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Сторінка 215
... perigee and apogee , and the line joining them and the earth of the line of apsides . ( 407. ) There are , however , several remarkable circumstances which interrupt the closeness of the analogy , which cannot fail to strike the reader ...
... perigee and apogee , and the line joining them and the earth of the line of apsides . ( 407. ) There are , however , several remarkable circumstances which interrupt the closeness of the analogy , which cannot fail to strike the reader ...
Сторінка 217
... perigee occurred before . ( 410. ) The best way to form a distinct conception of the moon's motion is to regard it as describing an ellipse about the earth in the focus , and , at the same time , to regard this ellipse itself to be in a ...
... perigee occurred before . ( 410. ) The best way to form a distinct conception of the moon's motion is to regard it as describing an ellipse about the earth in the focus , and , at the same time , to regard this ellipse itself to be in a ...
Сторінка 371
... perigee ; the extreme proportion being that of about 28:25 . This premised , let us first consider the effect of the normal force in displacing the lunar apsides . This we shall best be ena- bled to do by examining separately those ...
... perigee ; the extreme proportion being that of about 28:25 . This premised , let us first consider the effect of the normal force in displacing the lunar apsides . This we shall best be ena- bled to do by examining separately those ...
Сторінка 372
... perigee , and take the arcs A a , Ab , B c , Bd Fig . 91 . D v M = ++ B + E each 64 ° 14 ' . Then while P is between a and b the normal force act- ing outwards , and the moon being near its perigee , by art . 671 , the apsides will ...
... perigee , and take the arcs A a , Ab , B c , Bd Fig . 91 . D v M = ++ B + E each 64 ° 14 ' . Then while P is between a and b the normal force act- ing outwards , and the moon being near its perigee , by art . 671 , the apsides will ...
Сторінка 373
... perigee , con- ( 679. ) ( Case 3. ) Suppose , now , the major DE , and the perigee to be on the side of D. motion the normal force acts inwards , and the sequently the apsides advance , but with a moderate rapidity , the maxi- mum of ...
... perigee , con- ( 679. ) ( Case 3. ) Suppose , now , the major DE , and the perigee to be on the side of D. motion the normal force acts inwards , and the sequently the apsides advance , but with a moderate rapidity , the maxi- mum of ...
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Outlines of Astronomy John Frederick William Herschel,Sir John Frederick William Herschel Повний перегляд - 1851 |
Загальні терміни та фрази
altitude amount angle angular appear apsides ascertained astronomers 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 effect elements ellipse epoch equal equator equinoctial equinox error exact excentricity fixed globe gravity heavens heliocentric horizon inclination increase 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 perpendicular perturbations planet planetary pole portion position precession proper motions proportion recede recess reckoned refraction remarkable render respect result revolution right ascension rotation round satellites Saturn seen sidereal sidereal day sidereal period situation solar sphere spherical stars station sun's suppose syzygies tangential force telescope tion Uranus variation velocity visible whole zenith