Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
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Сторінка 31
... solar rays which , after the sun is itself concealed by the convexity of the earth , continue to traverse the higher regions of the atmosphere above our heads , and pass through and out of it , without directly striking on the earth at ...
... solar rays which , after the sun is itself concealed by the convexity of the earth , continue to traverse the higher regions of the atmosphere above our heads , and pass through and out of it , without directly striking on the earth at ...
Сторінка 32
... solar light , nor any , direct or reflected , from all that part of its visible atmosphere which is below A P M ; but from the lenticular portion P R x , which is traversed by the sun's rays , and which lies above the visible horizon ...
... solar light , nor any , direct or reflected , from all that part of its visible atmosphere which is below A P M ; but from the lenticular portion P R x , which is traversed by the sun's rays , and which lies above the visible horizon ...
Сторінка 33
... solar light , it should be observed , is increased by the irregularity of tem- perature caused by the same luminary in its different parts , which , during the daytime , throws it into a constant state of undulation , and , by thus ...
... solar light , it should be observed , is increased by the irregularity of tem- perature caused by the same luminary in its different parts , which , during the daytime , throws it into a constant state of undulation , and , by thus ...
Сторінка 73
... solar time by the proper rules and tables . ( 129. ) As another example of the use of the same triangle , we may propose to find the local sidereal time , and the latitude of the place of observation , by observing equal altitudes of ...
... solar time by the proper rules and tables . ( 129. ) As another example of the use of the same triangle , we may propose to find the local sidereal time , and the latitude of the place of observation , by observing equal altitudes of ...
Сторінка 74
... SOLAR TIME . OF THE MEASUREMENTS OF TIME . - CLOCKS , CHRONOMETERS . -OF AS- TRONOMICAL MEASUREMENTS . — PRINCIPLE OF TELESCOPIC SIGHTS TO INCREASE THE ACCURACY OF POINTING . -SIMPLEST APPLICA- TION OF THIS PRINCIPLE . -THE TRANSIT ...
... SOLAR TIME . OF THE MEASUREMENTS OF TIME . - CLOCKS , CHRONOMETERS . -OF AS- TRONOMICAL MEASUREMENTS . — PRINCIPLE OF TELESCOPIC SIGHTS TO INCREASE THE ACCURACY OF POINTING . -SIMPLEST APPLICA- TION OF THIS PRINCIPLE . -THE TRANSIT ...
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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.