Outlines of astronomy |
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Page xix
... measurements of time . Clocks , chronometers . Of astronomical measurements . Principle of telescopic sights to increase the accuracy of pointing . Simplest application of this principle . The transit instrument . Of the measurement of ...
... measurements of time . Clocks , chronometers . Of astronomical measurements . Principle of telescopic sights to increase the accuracy of pointing . Simplest application of this principle . The transit instrument . Of the measurement of ...
Page xx
... measures of gravity . The pendulum . Gravity to a spheroid . Other effects of the Earth's rotation . Trade winds ... Measurement of heights by the barometer CHAPTER V. OF URANOGRAPHY . - Page 125 Construction of celestial maps and globes ...
... measures of gravity . The pendulum . Gravity to a spheroid . Other effects of the Earth's rotation . Trade winds ... Measurement of heights by the barometer CHAPTER V. OF URANOGRAPHY . - Page 125 Construction of celestial maps and globes ...
Page 17
... measured with an instrument called the dip sector , is the same ( except under some singular atmospheric circumstances , which produce a temporary dis- tortion of the outline ) , in whatever direction the measure is taken , -properties ...
... measured with an instrument called the dip sector , is the same ( except under some singular atmospheric circumstances , which produce a temporary dis- tortion of the outline ) , in whatever direction the measure is taken , -properties ...
Page 18
... measure of its apparent angular diameter . Leaving , at present , out of con- sideration the effect of refraction in ... measured by the dip sector . Now , it is evident , 1st , that as the point M is more elevated above m , the point ...
... measure of its apparent angular diameter . Leaving , at present , out of con- sideration the effect of refraction in ... measured by the dip sector . Now , it is evident , 1st , that as the point M is more elevated above m , the point ...
Page 21
... measure the heights and exact distance of two stations which could barely be discerned from each other over the edge of the horizon , we could ascertain the actual size of the earth itself : and , in fact , were it not for the effect of ...
... measure the heights and exact distance of two stations which could barely be discerned from each other over the edge of the horizon , we could ascertain the actual size of the earth itself : and , in fact , were it not for the effect of ...
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Common terms and phrases
amount angle angular appear apsides ascertained astronomical attraction axis bright calculation celestial circle comet curve described diameter difference direction disc distance disturbed body disturbing force diurnal diurnal motion double stars earth ecliptic Edition effect epoch equal equator equinoctial equinox error exact excentricity fixed globe gravity heavens heliocentric hemisphere horizon inclination inequality instance instrument interval Julian period 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 phænomena planet planetary pole portion position precession proper motions proportion recede reckoned refraction remarkable respect result revolution revolving right ascension rotation round satellites Saturn seen sidereal sidereal day situation solar sphere spherical stars station sun's suppose surface syzygies tangential force telescope tion Uranus variation velocity visible vols whole zenith