Outlines of Astronomy |
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Page 21
... present work , may yet find their account in its perusal , for this reason , that it is always of advantage to present any given body of knowledge to the mind in as great a variety of different lights as possible . It is a property of ...
... present work , may yet find their account in its perusal , for this reason , that it is always of advantage to present any given body of knowledge to the mind in as great a variety of different lights as possible . It is a property of ...
Page 22
... present work will be found meagre , and quite inadequate to his wants . Its aim is entirely different ; being to present in each case the mere ultimate rationale of facts , arguments , and processes ; and , in all cases of mathe ...
... present work will be found meagre , and quite inadequate to his wants . Its aim is entirely different ; being to present in each case the mere ultimate rationale of facts , arguments , and processes ; and , in all cases of mathe ...
Page 30
... present , out of consideration the effect of refraction in the air below M , of which more hereafter , and which always tends , in some degree , to increase that angle , or render it more obtuse , this is the angle measured by the dip ...
... present , out of consideration the effect of refraction in the air below M , of which more hereafter , and which always tends , in some degree , to increase that angle , or render it more obtuse , this is the angle measured by the dip ...
Page 33
... present stage of the reader's knowledge , and help him to many just conceptions , on which account we shall exemplify its applica- tion in numbers . Now , it appears by observation , that two points , each ten feet above the surface ...
... present stage of the reader's knowledge , and help him to many just conceptions , on which account we shall exemplify its applica- tion in numbers . Now , it appears by observation , that two points , each ten feet above the surface ...
Page 35
... present , all nice ques- tions as to the probable existence of a definite limit to the atmosphere , beyond which there is , absolutely and rigorously speaking , no air , it is clear , that , for all practical purposes , we may speak of ...
... present , all nice ques- tions as to the probable existence of a definite limit to the atmosphere , beyond which there is , absolutely and rigorously speaking , no air , it is clear , that , for all practical purposes , we may speak of ...
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Common terms and phrases
altitude amount angle angular appear apsides ascertained astronomers 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 effect ellipse epoch equal equator equinoctial equinox error exact excentricity fixed globe gravity greater heavens heliocentric horizon inclination increase 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 perpendicular perturbations planet planetary pole portion position precession proper motions proportion recede recess reckoned refraction remarkable respect result revolution right ascension rotation round satellites Saturn seen sidereal sidereal day sidereal period situation solar sphere spherical stars station sun's suppose syzygies tangential force telescope tion Uranus variation velocity visible whole zenith