Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
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Сторінка v
... sidereal and nebular astronomy to the level of the present state of our knowledge in those departments . The chief ... days of light reading . The chap- ters devoted to it must , therefore , be considered A 3.
... sidereal and nebular astronomy to the level of the present state of our knowledge in those departments . The chief ... days of light reading . The chap- ters devoted to it must , therefore , be considered A 3.
Сторінка xvi
... sidereal to the solar day affected by precession . Incommensurability of the day and year . Its incon- venience . How obviated . The Julian Calendar . Irregularities at its first introduction . Reformed by Augustus . Gregorian ...
... sidereal to the solar day affected by precession . Incommensurability of the day and year . Its incon- venience . How obviated . The Julian Calendar . Irregularities at its first introduction . Reformed by Augustus . Gregorian ...
Сторінка 63
... sidereal day , and is divided into 24 sidereal hours , and these again into minutes and seconds . A clock which marks sidereal time , i . e . which goes at such a rate as always to show Oh . Om . Os . when the equinox comes on the ...
... sidereal day , and is divided into 24 sidereal hours , and these again into minutes and seconds . A clock which marks sidereal time , i . e . which goes at such a rate as always to show Oh . Om . Os . when the equinox comes on the ...
Сторінка 84
... days , a sidereal and a solar ; and if , instead of the sun , we observe the moon , we find a third , much longer than either , a lunar day , whose average duration is 24h 54m of our ordinary time , which last is solar time , being of ...
... days , a sidereal and a solar ; and if , instead of the sun , we observe the moon , we find a third , much longer than either , a lunar day , whose average duration is 24h 54m of our ordinary time , which last is solar time , being of ...
Сторінка 85
... daily arrival of the sun on the meridian , irregularities ( such they first seem to be ) begin to make their appearance . The ... day is not always of the same length . About the 21st of December , for ... SIDEREAL AND SOLAR TIME . 85.
... daily arrival of the sun on the meridian , irregularities ( such they first seem to be ) begin to make their appearance . The ... day is not always of the same length . About the 21st of December , for ... SIDEREAL AND SOLAR TIME . 85.
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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.