Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
З цієї книги
Результати 1-5 із 81
Сторінка xv
... ascertained . Perturbations of Uranus resulting in the discovery of Neptune - Page 454 PART III . OF SIDEREAL ASTRONOMY . CHAPTER XV . Of the fixed stars . Their classification by magnitudes . Photometric scale of magnitudes ...
... ascertained . Perturbations of Uranus resulting in the discovery of Neptune - Page 454 PART III . OF SIDEREAL ASTRONOMY . CHAPTER XV . Of the fixed stars . Their classification by magnitudes . Photometric scale of magnitudes ...
Сторінка 3
... the necessity of being on every point , within that limit , rather diffuse and copious in explanation , as well as the eminently matured and ascertained character of the science itself , render this course B 2 INTRODUCTION . 3.
... the necessity of being on every point , within that limit , rather diffuse and copious in explanation , as well as the eminently matured and ascertained character of the science itself , render this course B 2 INTRODUCTION . 3.
Сторінка 20
... ) , this would be a tolerably good method of ascertaining it . Suppose A and B to be two eminences , whose perpendicular heights A a and Bb ( which R for simplicity , we will suppose to be exactly 20 OUTLINES OF ASTRONOMY .
... ) , this would be a tolerably good method of ascertaining it . Suppose A and B to be two eminences , whose perpendicular heights A a and Bb ( which R for simplicity , we will suppose to be exactly 20 OUTLINES OF ASTRONOMY .
Сторінка 21
... ascertaining the dimensions of the earth , yet it will suffice to afford such an approximation to it as shall be of use in the present stage of the reader's knowledge , and help him to many just con- ceptions , on which account we shall ...
... ascertaining the dimensions of the earth , yet it will suffice to afford such an approximation to it as shall be of use in the present stage of the reader's knowledge , and help him to many just con- ceptions , on which account we shall ...
Сторінка 24
... ascertaining the existence of any air at all would fail to afford the slightest perceptible indications of its presence . ( 34. ) Laying out of consideration , therefore , at present , all nice questions as to the probable existence of ...
... ascertaining the existence of any air at all would fail to afford the slightest perceptible indications of its presence . ( 34. ) Laying out of consideration , therefore , at present , all nice questions as to the probable existence of ...
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.