Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
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Сторінка 18
... surface , th will open , and the ruler will become more nearly st but will not attain perfect straightness till M is br fairly up to contact with the surface at m , in which its whole length will become a tangent to the sphere at is the ...
... surface , th will open , and the ruler will become more nearly st but will not attain perfect straightness till M is br fairly up to contact with the surface at m , in which its whole length will become a tangent to the sphere at is the ...
Сторінка 17
... surface the circle NOPQ . The area of the spherical surface compreB 10 C 2 M D " Opigw , to terminate , F A hended within this circle is the portion of the earth's surface visible to a spectator at M , and the angle N M Q included ...
... surface the circle NOPQ . The area of the spherical surface compreB 10 C 2 M D " Opigw , to terminate , F A hended within this circle is the portion of the earth's surface visible to a spectator at M , and the angle N M Q included ...
Сторінка 18
... surface , the legs will open , and the ruler will become more nearly straight , but will not attain perfect straightness till M is brought fairly up to contact with the surface at m , in which case its whole length will become a tangent ...
... surface , the legs will open , and the ruler will become more nearly straight , but will not attain perfect straightness till M is brought fairly up to contact with the surface at m , in which case its whole length will become a tangent ...
Сторінка 19
... surface , and does not arise from the inability of the eye to follow objects to a greater distance , or from at- mospheric indistinctness . It will be worth while to pursue the general notion thus acquired into some of its consequences ...
... surface , and does not arise from the inability of the eye to follow objects to a greater distance , or from at- mospheric indistinctness . It will be worth while to pursue the general notion thus acquired into some of its consequences ...
Сторінка 22
... surface : a scratch , or pin - hole , duly re- presenting it , on the surface of such a globe as our model , would be imperceptible without a magnifier . ( 31. ) The greatest depth of sea , probably , does not very much exceed the ...
... surface : a scratch , or pin - hole , duly re- presenting it , on the surface of such a globe as our model , would be imperceptible without a magnifier . ( 31. ) The greatest depth of sea , probably , does not very much exceed the ...
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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.