An Introduction to Astronomy ... |
From inside the book
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Page 90
... angle of forty - five degrees with the horizon ; this rule was not only confirmed by Galileo , but extended still further , by his proving that at all angles equally above and below forty - five degrees , the range would be the same ...
... angle of forty - five degrees with the horizon ; this rule was not only confirmed by Galileo , but extended still further , by his proving that at all angles equally above and below forty - five degrees , the range would be the same ...
Page 142
... angle NCO at the centre , or the altitude of the polar star on ; but this seeming difficulty vanishes , when we consider the immense distance of the fixed stars , to 1 But as the pole star is not exactly in 142 LATITUDE AND LONGITUDE ...
... angle NCO at the centre , or the altitude of the polar star on ; but this seeming difficulty vanishes , when we consider the immense distance of the fixed stars , to 1 But as the pole star is not exactly in 142 LATITUDE AND LONGITUDE ...
Page 143
... angle of elevation at z , will be the same as at c ; be cause if a line zr be drawn from z to p , it will be so nearly parallel to cr , as to occasion no sensible error . tion of the whole . Suppose then , a spectator LET . IX ...
... angle of elevation at z , will be the same as at c ; be cause if a line zr be drawn from z to p , it will be so nearly parallel to cr , as to occasion no sensible error . tion of the whole . Suppose then , a spectator LET . IX ...
Page 145
... angle with the meridian , east - south - east , as was shown by the compass ; and on this line set off the dis- tance 100 leagues from L to M , taken from the scale in the figure , and м will represent , on the chart , the situation of ...
... angle with the meridian , east - south - east , as was shown by the compass ; and on this line set off the dis- tance 100 leagues from L to M , taken from the scale in the figure , and м will represent , on the chart , the situation of ...
Page 170
... angle considerably less than that of ninety degrees , are subject to an annual change of their seasons , and to a great variety in the length of their days and nights . As only one half of the globe can be enlightened at a time , the ...
... angle considerably less than that of ninety degrees , are subject to an annual change of their seasons , and to a great variety in the length of their days and nights . As only one half of the globe can be enlightened at a time , the ...
Common terms and phrases
ancient angle appear astronomers axis bodies called celestial centre Ceres circle clock comets dark degrees determined diameter disc discovered discoveries diurnal diurnal rotation doctrine earth eclipse epact equal equator fall figure fixed stars force globe gravity greater greatest half heavens hemisphere horizon hundred idea imagined instrument Jupiter Kepler latitude less Libra light longitude lunar lunar eclipse magnitude manner measure Mercury meridian method millions of miles minutes moon moon's motion move round nature Newton night nodes noon north pole northern northern hemisphere observed occasioned orbit parallax pass perceive perihelion phænomena phænomenon philosophers planets pole reckoned revolution revolves round rotation round the earth round the sun satellites Saturn seconds seen situation solar southern constellation space sun and moon sun's supposed surface tance telescope things thousand tion toises twelve Tycho Brahe Uranus Venus Vesta Villejuif whilst zenith
Popular passages
Page 58 - Or, if they list to try Conjecture, he his fabric of the Heavens Hath left to their disputes — perhaps to move His laughter at their quaint opinions wide Hereafter, when they come to model Heaven, And calculate the stars; how they will wield The mighty frame; how build, unbuild, contrive To save appearances; how gird the Sphere With Centric and Eccentric scribbled o'er, Cycle and Epicycle, orb in orb.
Page 289 - Or of the eternal co-eternal beam, May I express thee unblamed ? since God is light, And never but in unapproached light Dwelt from eternity, dwelt then in thee, Bright effluence of bright essence increate. Or hear'st thou rather pure ethereal stream, Whose fountain who shall tell?
Page 332 - He scarce had ceased, when the superior fiend Was moving toward the shore: his ponderous shield, Ethereal temper, massy, large, and round, Behind him cast; the broad circumference Hung on his shoulders like the moon, whose orb Through optic glass the Tuscan artist views, At evening, from the top of Fesole, Or in Valdarno, to descry new lands, Rivers, or mountains, in her spotty globe.
Page 382 - Less than archangel ruined, and the excess Of glory obscured ; as when the sun, new risen, Looks through the horizontal misty air Shorn of his beams, or from behind the moon, In dim eclipse, disastrous twilight sheds On half the nations, and with fear of change Perplexes monarchs.
Page 294 - Horrid with frost and turbulent with storm, Blows autumn, and his golden fruits, away : Then melts into the spring : soft spring, with breath Favonian, from warm chambers of the south, Recalls the first.
Page 289 - Or hear'st thou rather pure ethereal stream, Whose fountain who shall tell? Before the sun, Before the heavens thou wert, and at the voice Of God, as with a mantle didst invest The rising world of waters dark and deep, Won from the void and formless infinite.
Page 289 - His mirror, with full face borrowing her light From him, for other light she needed none In that...
Page 401 - This Being governs all things, not as the Soul of the World, but as Lord over all; and, on account of his dominion, he is wont to be called Lord God, or Universal Ruler.
Page 400 - This most beautiful System of the Sun, Planets, and Comets, could only proceed from the counsel and dominion of an intelligent and powerful Being.
Page 76 - Works in the secret deep; shoots, steaming, thence The fair profusion that o'erspreads the Spring: Flings from the sun direct the flaming day; Feeds every creature ; hurls the tempest forth ; And, as on earth this grateful change revolves, With transport touches all the springs of life.