Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
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Сторінка 33
... evident , that whenever a ray passes obliquely from a higher level to a lower one , or vice versâ , its course is not rectilinear , but concave downwards ; and of course any object seen by means of such a ray , must appear deviated from ...
... evident , that whenever a ray passes obliquely from a higher level to a lower one , or vice versâ , its course is not rectilinear , but concave downwards ; and of course any object seen by means of such a ray , must appear deviated from ...
Сторінка 37
... evident that a spectator at rest ( as it appears to him ) on any part of it will , unperceived by himself , be carried round with it : unperceived , we say , because his horizon will constantly contain , and be limited by , the same ...
... evident that a spectator at rest ( as it appears to him ) on any part of it will , unperceived by himself , be carried round with it : unperceived , we say , because his horizon will constantly contain , and be limited by , the same ...
Сторінка 49
... evident that the difference of angular position of P , with respect to the invariable direction A B D , when viewed from A and from B , is the difference of the two angles DB P and D A P ; now , D B P being the exterior angle of the ...
... evident that the difference of angular position of P , with respect to the invariable direction A B D , when viewed from A and from B , is the difference of the two angles DB P and D A P ; now , D B P being the exterior angle of the ...
Сторінка 79
... evident . The imperfect products of man's hands are here tested by being brought into comparison under very great magnifying powers ( corresponding in effect to a great increase in acuteness of perception ) with the perfect workmanship ...
... evident . The imperfect products of man's hands are here tested by being brought into comparison under very great magnifying powers ( corresponding in effect to a great increase in acuteness of perception ) with the perfect workmanship ...
Сторінка 80
... evident ) that the first glimpse we catch of such subordinate laws the first form in which they are dimly shadowed out to our minds is that of errors . We perceive a discordance between what we expect , and what we find . The first oc ...
... evident ) that the first glimpse we catch of such subordinate laws the first form in which they are dimly shadowed out to our minds is that of errors . We perceive a discordance between what we expect , and what we find . The first oc ...
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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.