Outlines of Astronomy |
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Page xxvii
... round each other . Describe elliptic orbits under the Newtonian law of gravity . Elements of orbits of several . Actual dimensions of their orbits . Coloured double stars . Phæno- zenon of complementary colours . Sanguine stars . Proper ...
... round each other . Describe elliptic orbits under the Newtonian law of gravity . Elements of orbits of several . Actual dimensions of their orbits . Coloured double stars . Phæno- zenon of complementary colours . Sanguine stars . Proper ...
Page 16
... round a very large extent of the horizon ; and , besides , the moon and stars also set and rise again in all points of the visible horizon . The conclusion is plain : the earth cannot extend indefinitely in depth downwards , nor ...
... round a very large extent of the horizon ; and , besides , the moon and stars also set and rise again in all points of the visible horizon . The conclusion is plain : the earth cannot extend indefinitely in depth downwards , nor ...
Page 31
... round it , which the rays of light have undergone in their passage through the air , as alluded to in art . 40 . moon . 5thly . That when the barometer is higher than its average or mean state , the amount of refraction is greater than ...
... round it , which the rays of light have undergone in their passage through the air , as alluded to in art . 40 . moon . 5thly . That when the barometer is higher than its average or mean state , the amount of refraction is greater than ...
Page 37
... round the corner ; but the zone thus added to his visual range can hardly ever , unless in very extraordinary circumstances , exceed a couple of degrees in breadth , and is always ill seen on account of the vapours near the horizon ...
... round the corner ; but the zone thus added to his visual range can hardly ever , unless in very extraordinary circumstances , exceed a couple of degrees in breadth , and is always ill seen on account of the vapours near the horizon ...
Page 38
... round the sphere , sinks in succession beneath them . The novelty and splendour of fresh constellations thus gra- B dually brought into view in the clear calm nights of tropical climates , in long voyages to the south , is dwelt upon by ...
... round the sphere , sinks in succession beneath them . The novelty and splendour of fresh constellations thus gra- B dually brought into view in the clear calm nights of tropical climates , in long voyages to the south , is dwelt upon by ...
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Common terms and phrases
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