Outlines of astronomy |
From inside the book
Results 1-5 of 100
Page xxiii
... visible course among the constellations . Its Internal structure . Its apparently indefinite extent in certain direc- tions . Of the distance of the fixed stars . Their annual parallax . Parallactic unit of sidereal distance . Effect of ...
... visible course among the constellations . Its Internal structure . Its apparently indefinite extent in certain direc- tions . Of the distance of the fixed stars . Their annual parallax . Parallactic unit of sidereal distance . Effect of ...
Page 11
... visible universe , their constitution and physical condition , so far as they can be known to us , with their mutual influences and actions on each other , so far as they can be traced by the effects produced , and established by ...
... visible universe , their constitution and physical condition , so far as they can be known to us , with their mutual influences and actions on each other , so far as they can be traced by the effects produced , and established by ...
Page 16
... visible horizon . The conclusion is plain : the earth cannot extend indefinitely in depth downwards , nor indefinitely in surface laterally ; it must have not only bounds in a horizontal direction , but also an under side round which ...
... visible horizon . The conclusion is plain : the earth cannot extend indefinitely in depth downwards , nor indefinitely in surface laterally ; it must have not only bounds in a horizontal direction , but also an under side round which ...
Page 18
... visible horizon ; and as this tangent sweeps round M , and comes successively into the positions MO o , MP p , M Q q , the point of contact N will mark out on the surface the circle NOPQ . The area of the spherical surface compre- Z B ...
... visible horizon ; and as this tangent sweeps round M , and comes successively into the positions MO o , MP p , M Q q , the point of contact N will mark out on the surface the circle NOPQ . The area of the spherical surface compre- Z B ...
Page 19
... visible horizon appears depressed below the direction of a spirit - level- that is called See these instruments described in Chap . III . m . the dip of the horizon . It is a correction C 2 THE HORIZON AND ITS DIP . 19.
... visible horizon appears depressed below the direction of a spirit - level- that is called See these instruments described in Chap . III . m . the dip of the horizon . It is a correction C 2 THE HORIZON AND ITS DIP . 19.
Other editions - View all
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 Edition effect epoch equal equator equinoctial equinox error exact excentricity fixed globe gravity heavens heliocentric hemisphere horizon inclination inequality instance instrument interval Julian period 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 proper motions proportion recede reckoned 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 vols whole zenith