Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
З цієї книги
Результати 1-5 із 100
Сторінка xv
... fixed stars . Their classification by magnitudes . Photometric scale of magnitudes . Conventional or vulgar scale . Photometric comparison of stars . Distribution of stars over the heavens . Of the Milky Way or galaxy . Its supposed ...
... fixed stars . Their classification by magnitudes . Photometric scale of magnitudes . Conventional or vulgar scale . Photometric comparison of stars . Distribution of stars over the heavens . Of the Milky Way or galaxy . Its supposed ...
Сторінка 15
... fixed supports- existing insulated in space from contact of every thing ex- ternal , it becomes easy to imagine it in motion - or , rather , difficult to imagine it otherwise ; for , since there is nothing to retain it in one place ...
... fixed supports- existing insulated in space from contact of every thing ex- ternal , it becomes easy to imagine it in motion - or , rather , difficult to imagine it otherwise ; for , since there is nothing to retain it in one place ...
Сторінка 40
... fixed places on the surface , but shift upon it every moment . moment . Such changes , however , are inconsistent with the idea of a rotation . of a body of regular figure about its axis of symmetry , per- formed in free space , and ...
... fixed places on the surface , but shift upon it every moment . moment . Such changes , however , are inconsistent with the idea of a rotation . of a body of regular figure about its axis of symmetry , per- formed in free space , and ...
Сторінка 42
... fixed mark , it may easily be supposed at rest , and be , itself , mistaken for the common centre about which all the others in that region describe their circles ; or it may be known by its configuration with a very splendid and re ...
... fixed mark , it may easily be supposed at rest , and be , itself , mistaken for the common centre about which all the others in that region describe their circles ; or it may be known by its configuration with a very splendid and re ...
Сторінка 47
... fixed axis . In order to show this , however , it will be necessary to premise a few ob- servations on parallactic ... fix his eye steadily on any ob- ject , but at the same time not entirely withdraw his atten- tion from the general ...
... fixed axis . In order to show this , however , it will be necessary to premise a few ob- servations on parallactic ... fix his eye steadily on any ob- ject , but at the same time not entirely withdraw his atten- tion from the general ...
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.