Outlines of AstronomyLongman, green and Roberts, 1859 - 714 pages |
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Page xx
... sun . Its distance and magnitude . Copernican explanation of the Sun's apparent motion . Parallelism of the Earth's axis . The seasons . Heat received from the Sun in different parts of the orbit . Effect of excentricity of the orbit ...
... sun . Its distance and magnitude . Copernican explanation of the Sun's apparent motion . Parallelism of the Earth's axis . The seasons . Heat received from the Sun in different parts of the orbit . Effect of excentricity of the orbit ...
Page xxiv
... Sun's motion . whole sidereal system round a common centre . Systematic parallax and aberration . Effect of the motion of light in altering the apparent period of a binary star CHAPTER XVII . OF CLUSTERS OF STARS AND NEBULÆ . - Page 596 ...
... Sun's motion . whole sidereal system round a common centre . Systematic parallax and aberration . Effect of the motion of light in altering the apparent period of a binary star CHAPTER XVII . OF CLUSTERS OF STARS AND NEBULÆ . - Page 596 ...
Page 33
... sun's rays , and which lies above . the visible horizon B R of B , it receives a twilight , which is strongest at R , the point immediately below which the sun is , and fades away gradually towards P , as the luminous part of the ...
... sun's rays , and which lies above . the visible horizon B R of B , it receives a twilight , which is strongest at R , the point immediately below which the sun is , and fades away gradually towards P , as the luminous part of the ...
Page 35
... sun , for instance , which at a considerable altitude always ap- pears round , assumes , as it approaches the horizon ... sun's cir- cumference equally raised by refraction , it would still appear circular , though displaced ; but the ...
... sun , for instance , which at a considerable altitude always ap- pears round , assumes , as it approaches the horizon ... sun's cir- cumference equally raised by refraction , it would still appear circular , though displaced ; but the ...
Page 69
... sun , and as much depressed below the horizon as the sun is elevated above it , is not unfrequently noticed , the back of the spectator being turned to the sun's place . Occasionally , but much more rarely , the whole course of such a ...
... sun , and as much depressed below the horizon as the sun is elevated above it , is not unfrequently noticed , the back of the spectator being turned to the sun's place . Occasionally , but much more rarely , the whole course of such a ...
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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 effect epoch equal equator equinoctial equinox error exact excentricity fixed globe gravity heavens heliocentric hemisphere 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 perturbations phænomena planet planetary pole portion position precession precisely proper motions proportion recede recess reckoned refraction remarkable render respect result revolution revolving right ascension ring 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 whole zenith