Introduction to Astronomy: For the Use of Science Classes and Elementary and Middle Class SchoolsG. P. Putnam's sons, 1873 - 174 páginas |
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Página 9
... bodies , it is necessary that we should have correct ideas of the size and form of the Earth itself . That its surface is curved , and its whole figure more or less spherical , appears from the following considerations :-( 1 . ) When a ...
... bodies , it is necessary that we should have correct ideas of the size and form of the Earth itself . That its surface is curved , and its whole figure more or less spherical , appears from the following considerations :-( 1 . ) When a ...
Página 14
... bodies , of which rude notions might be obtained from certain phenomena which occasionally take place , as eclipses , occultations of the fixed stars by the moon , & c . , the first of these hypotheses might be shown to be extremely ...
... bodies , of which rude notions might be obtained from certain phenomena which occasionally take place , as eclipses , occultations of the fixed stars by the moon , & c . , the first of these hypotheses might be shown to be extremely ...
Página 25
... bodies at the poles and the equator ? 15. How may this be determined experimentally ? 16. What difference in the weight of a body results from these experiments ? Is this difference to be attributed wholly to centri- fugal force ? 17 ...
... bodies at the poles and the equator ? 15. How may this be determined experimentally ? 16. What difference in the weight of a body results from these experiments ? Is this difference to be attributed wholly to centri- fugal force ? 17 ...
Página 37
... bodies not far removed from the earth , a further correction is added , so that the results from all places upon the earth may be comparable , It is agreed to refer all observations of this kind to the centre of the earth , and to give ...
... bodies not far removed from the earth , a further correction is added , so that the results from all places upon the earth may be comparable , It is agreed to refer all observations of this kind to the centre of the earth , and to give ...
Página 46
... bodies than the sun having independent motions . The moon in only a few hours shows a very rapid and palpable movement , and a few bright objects , which we call planets ( λVÝτNS , a wanderer ) , are also detected to have very ...
... bodies than the sun having independent motions . The moon in only a few hours shows a very rapid and palpable movement , and a few bright objects , which we call planets ( λVÝτNS , a wanderer ) , are also detected to have very ...
Otras ediciones - Ver todas
Introduction to Astronomy - For the Use Od Science Classes and Elementary ... John Isaac Plummer Sin vista previa disponible - 2010 |
Términos y frases comunes
61 Cygni aberration of light altitude amount angle aphelion apparent diameter appear astronomical atmosphere attraction axis bodies bright called cause centre circle colour comet compared conjunction density determined difference direction disc diurnal diurnal motion earth eccentricity effect equal equator equatorial equinox Explain fixed stars force Give gravity greater heavens hemisphere hence horizon inclined inferior conjunction inferior planets interval Jupiter known latitude length less libration longitude lunar eclipse magnitude Mars mass mean distance measured Mercury meridian meteors miles moon moon's motion nearly nebulæ Neptune node object observed opposition orbit parallax pass penumbra perihelion perturbations phenomena planetary point of Aries polar pole position precession radius refraction revolving round right ascensions rings rotation round the sun satellites Saturn seen shadow sidereal sidereal period similar solar day solar eclipse solar system solstice spots sun's supposing surface synodical period syzygy telescope tion transit Uranus velocity Venus visible zenith
Pasajes populares
Página 54 - that every particle of matter in the universe attracts every other particle, with a force whose direction is that of the line joining the two, and whose magnitude is directly as the product of their masses, and inversely as the square of their distances from each other.