Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
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Сторінка 22
... known hardly exceeds five miles in perpendicular elevation : this is only one 1600th part of the earth's diameter ; consequently , on a globe of sixteen inches in diameter , such a mountain would be represented by a protuberance of no ...
... known hardly exceeds five miles in perpendicular elevation : this is only one 1600th part of the earth's diameter ; consequently , on a globe of sixteen inches in diameter , such a mountain would be represented by a protuberance of no ...
Сторінка 42
... known by its configuration with a very splendid and re- markable constellation or group of stars , called by astronomers the GREAT BEAR . to ( 60. ) He will further observe , that the apparent relative situations of all the stars among ...
... known by its configuration with a very splendid and re- markable constellation or group of stars , called by astronomers the GREAT BEAR . to ( 60. ) He will further observe , that the apparent relative situations of all the stars among ...
Сторінка 62
... known , its place in the visible heavens is determined . ( 105. ) DEF . 22. The declination of a heavenly body is its angular distance from the equinoctial or celestial equator , or the complement to 90 ° of its angular distance from ...
... known , its place in the visible heavens is determined . ( 105. ) DEF . 22. The declination of a heavenly body is its angular distance from the equinoctial or celestial equator , or the complement to 90 ° of its angular distance from ...
Сторінка 71
... known to the reader , or for which he will consult appropriate treatises . We shall only here observe generally , that in all problems in which spherical geometry is concerned , the student will find it a useful practical maxim rather ...
... known to the reader , or for which he will consult appropriate treatises . We shall only here observe generally , that in all problems in which spherical geometry is concerned , the student will find it a useful practical maxim rather ...
Сторінка 72
... position micrometer , this angle is sometimes required to be known ; and , when so required , it will be not inconveniently referred to as the angle of position of the zenith . " distance is 90 ° 34 ' - ZS . Its 72 OUTLINES OF ASTRONOMY .
... position micrometer , this angle is sometimes required to be known ; and , when so required , it will be not inconveniently referred to as the angle of position of the zenith . " distance is 90 ° 34 ' - ZS . Its 72 OUTLINES OF ASTRONOMY .
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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
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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.