Outlines of Astronomy |
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Page xxiv
... less spotted state of its surface . Temperature of its surface . Its expenditure of heat . Probable cause of solar radiation CHAPTER VII . 219 Of the Moon . Its sidereal period . Its apparent diameter . Its parallax , distance , and ...
... less spotted state of its surface . Temperature of its surface . Its expenditure of heat . Probable cause of solar radiation CHAPTER VII . 219 Of the Moon . Its sidereal period . Its apparent diameter . Its parallax , distance , and ...
Page xxiv
... less spotted state of its surface . Temperature of its surface . Its expenditure of heat . Probable cause of solar radiation CHAPTER VII . 219 Of the Moon . Its sidereal period . Its apparent diameter . Its parallax , distance , and ...
... less spotted state of its surface . Temperature of its surface . Its expenditure of heat . Probable cause of solar radiation CHAPTER VII . 219 Of the Moon . Its sidereal period . Its apparent diameter . Its parallax , distance , and ...
Page 31
... less a quantity than 33 ' , which is rather more than the greatest apparent diameter of either the sun or the Hence it follows , that when we see the lower edge of the sun or moon just apparently resting on the horizon , its whole disk ...
... less a quantity than 33 ' , which is rather more than the greatest apparent diameter of either the sun or the Hence it follows , that when we see the lower edge of the sun or moon just apparently resting on the horizon , its whole disk ...
Page 33
... less bent in passing through it , the lower most , the higher less , and that which , like SR O , merely grazes the exterior limit of the atmosphere , not at all . Let us consider several points , A , B , C , D , each more remote than ...
... less bent in passing through it , the lower most , the higher less , and that which , like SR O , merely grazes the exterior limit of the atmosphere , not at all . Let us consider several points , A , B , C , D , each more remote than ...
Page 34
... a difference of den- sity in the aërial strata , must also have , corresponding to it , a certain amount of refraction ; less , indeed , than what would be produced by the whole atmosphere , but still often 34 OUTLINES OF ASTRONOMY .
... a difference of den- sity in the aërial strata , must also have , corresponding to it , a certain amount of refraction ; less , indeed , than what would be produced by the whole atmosphere , but still often 34 OUTLINES OF ASTRONOMY .
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amount angle angular appear apsides ascertained astronomical atmosphere attraction axis bright calculation celestial circle coincidence comet curve described diameter difference direction disc distance disturbed body disturbing force diurnal diurnal motion double stars earth ecliptic effect ellipse epoch equal equator equinoctial equinox error exact excentricity fixed globe gravity heavens heliocentric hemisphere horizon inclination inequality instance instrument interval Jupiter latitude latter less light longitude lunar magnitude mass mean measure meridian micrometrical moon moon's nearly nebula node normal force nutation object observed orbit parallax parallel perigee perihelion period perturbations phænomena phænomenon planet planetary pole portion position precession precisely proper motion proportion recede recess 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 whole zenith