Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
З цієї книги
Результати 6-10 із 100
Сторінка 40
... body under the influence of external agency are conceivable , in which the poles of the imaginary line or axis about which it is at any moment revolving shall hold no fixed places on the surface , but shift upon it every moment . moment ...
... body under the influence of external agency are conceivable , in which the poles of the imaginary line or axis about which it is at any moment revolving shall hold no fixed places on the surface , but shift upon it every moment . moment ...
Сторінка 53
... bodies . On the other hand , that a spherical mass of moderate dimensions ( or , rather , when compared with the surrounding and visible uni- verse , of evanescent magnitude ) , held by no tie , and free to move and to revolve , should ...
... bodies . On the other hand , that a spherical mass of moderate dimensions ( or , rather , when compared with the surrounding and visible uni- verse , of evanescent magnitude ) , held by no tie , and free to move and to revolve , should ...
Сторінка 55
... bodies is the same as if either of them were at rest , and all its motion communicated to the other in an opposite direction . * Hence , if two bodies move alike , they will , when seen from each other ( without reference to other near ...
... bodies is the same as if either of them were at rest , and all its motion communicated to the other in an opposite direction . * Hence , if two bodies move alike , they will , when seen from each other ( without reference to other near ...
Сторінка 62
... body is its ap- parent angular elevation above the horizon . It is the com- plement to 90 ° , therefore , of its zenith distance . The alti- tude and azimuth of an object being known , its place in the visible heavens is determined ...
... body is its ap- parent angular elevation above the horizon . It is the com- plement to 90 ° , therefore , of its zenith distance . The alti- tude and azimuth of an object being known , its place in the visible heavens is determined ...
Сторінка 140
... bodies , whether solid or liquid , tend to fall towards the earth . By this fraction of its weight , then , the sea at ... body , constituted internally as we have reason to believe the earth to be ; covered wholly or partially with a ...
... bodies , whether solid or liquid , tend to fall towards the earth . By this fraction of its weight , then , the sea at ... body , constituted internally as we have reason to believe the earth to be ; covered wholly or partially with a ...
Інші видання - Показати все
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
Популярні уривки
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.