Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
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Сторінка 16
... produce a temporary dis- tortion of the outline ) , in whatever direction the measure is taken , ―properties which belong only to the circle among geometrical figures . If we ascend a high eminence on a plain ( for instance , one of the ...
... produce a temporary dis- tortion of the outline ) , in whatever direction the measure is taken , ―properties which belong only to the circle among geometrical figures . If we ascend a high eminence on a plain ( for instance , one of the ...
Сторінка 26
... produces a false impression respecting their places , which must be rectified by ascertaining the amount and direction of the displacement so apparently produced on each , before we can come at a knowledge of the true directions in 26 ...
... produces a false impression respecting their places , which must be rectified by ascertaining the amount and direction of the displacement so apparently produced on each , before we can come at a knowledge of the true directions in 26 ...
Сторінка 33
... produced in the progress of a ray of light through successive strata , or layers , of the atmosphere , it will be evident , that whenever a ray passes obliquely from a higher level to a lower one , or vice versâ , its course is not ...
... produced in the progress of a ray of light through successive strata , or layers , of the atmosphere , it will be evident , that whenever a ray passes obliquely from a higher level to a lower one , or vice versâ , its course is not ...
Сторінка 34
... produced on celestial objects , or such as are beyond the atmosphere , and which is called celestial or astronomical refraction . ( 47. ) Another effect of refraction is to distort the visible forms and proportions of objects seen near ...
... produced on celestial objects , or such as are beyond the atmosphere , and which is called celestial or astronomical refraction . ( 47. ) Another effect of refraction is to distort the visible forms and proportions of objects seen near ...
Сторінка 51
... produce no change in their general aspect to his unassisted sight . This is one of the innumerable instances where accurate measurement obtained by instrumental means places us in a totally different situation in respect to matters of ...
... produce no change in their general aspect to his unassisted sight . This is one of the innumerable instances where accurate measurement obtained by instrumental means places us in a totally different situation in respect to matters of ...
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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.