Outlines of AstronomyBlanchard & Lea, 1856 - 557 стор. |
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Сторінка 20
... spherical ; the elementary principles of mechanics ; and enough of optics to understand the construction and use of the telescope , and some other of the simpler instruments . Of course , the more of such knowledge he brings to the ...
... spherical ; the elementary principles of mechanics ; and enough of optics to understand the construction and use of the telescope , and some other of the simpler instruments . Of course , the more of such knowledge he brings to the ...
Сторінка 30
... spherical surface comprehended within this circle is the portion of the earth's surface visible to a spectator at M , and the angle NMQ included between the two extreme visual rays is the measure of its apparent angular diameter ...
... spherical surface comprehended within this circle is the portion of the earth's surface visible to a spectator at M , and the angle NMQ included between the two extreme visual rays is the measure of its apparent angular diameter ...
Сторінка 31
... spherical surface of the sea , which protrudes between them and ourselves . Suppose a ship , for instance , to sail directly away from our station ; at first , when the distance of the ship is small , a spectator , S , situated at some ...
... spherical surface of the sea , which protrudes between them and ourselves . Suppose a ship , for instance , to sail directly away from our station ; at first , when the distance of the ship is small , a spectator , S , situated at some ...
Сторінка 34
... spherical segment is to the whole surface of the sphere to which it belongs as the versed sine or thick- ness of the segment is to the diameter of the sphere ; and further , that this thickness , in the case we are considering , is ...
... spherical segment is to the whole surface of the sphere to which it belongs as the versed sine or thick- ness of the segment is to the diameter of the sphere ; and further , that this thickness , in the case we are considering , is ...
Сторінка 36
... spherical shell , concentric with the general surface of the sea and land , and each of which is rarer , or specifically lighter , than that immediately beneath it ; and denser , or specifically heavier , than that immediately above it ...
... spherical shell , concentric with the general surface of the sea and land , and each of which is rarer , or specifically lighter , than that immediately beneath it ; and denser , or specifically heavier , than that immediately above it ...
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Outlines of Astronomy John Frederick William Herschel,Sir John Frederick William Herschel Повний перегляд - 1851 |
Загальні терміни та фрази
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 elements ellipse epoch equal equator equinoctial equinox error exact excentricity fixed globe gravity 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 render 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