Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 pages |
From inside the book
Results 1-5 of 100
Page xii
... magnitude . Copernican explanation of the Sun's apparent motion . Parallelism of the Earth's axis . The seasons . Heat received from the Sun in different parts of the orbit . Mean and true longitudes of the Sun. Equation of the centre ...
... magnitude . Copernican explanation of the Sun's apparent motion . Parallelism of the Earth's axis . The seasons . Heat received from the Sun in different parts of the orbit . Mean and true longitudes of the Sun. Equation of the centre ...
Page xv
... 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 form that of a flat stratum partially ...
... 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 form that of a flat stratum partially ...
Page 2
... magnitude to the earth itself , the other im- mensely surpassing it . The planets , which appear only as stars somewhat brighter than the rest , are to him spacious , elaborate , and habitable worlds ; several of them much greater and ...
... magnitude to the earth itself , the other im- mensely surpassing it . The planets , which appear only as stars somewhat brighter than the rest , are to him spacious , elaborate , and habitable worlds ; several of them much greater and ...
Page 22
... magnitude ; and it will not be amiss , if we take advantage of it to compare it with objects we have been accustomed to consider as of vast size , so as to interpose a few steps between it and our ordinary ideas of dimension . We have ...
... magnitude ; and it will not be amiss , if we take advantage of it to compare it with objects we have been accustomed to consider as of vast size , so as to interpose a few steps between it and our ordinary ideas of dimension . We have ...
Page 34
... magnitudes . Actual measurement with a proper in- strument corrects our error , without , however , dispelling our illusion . By this we learn , that the sun , when just on the horizon , subtends at our eyes almost exactly the same ...
... magnitudes . Actual measurement with a proper in- strument corrects our error , without , however , dispelling our illusion . By this we learn , that the sun , when just on the horizon , subtends at our eyes almost exactly the same ...
Other editions - View all
Common terms and phrases
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
Popular passages
Page 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.