An Introduction to Astronomy ...J. Nunn, 1816 - 428 էջ |
From inside the book
Արդյունքներ 57–ի 1-ից 5-ը:
Էջ 7
... measure of time ; but how is this to be obtained ? We have the idea of succession only from motion ; and in order that the division of it into parts may be accurate , it is requisite that the motion should be constant and uniform but ...
... measure of time ; but how is this to be obtained ? We have the idea of succession only from motion ; and in order that the division of it into parts may be accurate , it is requisite that the motion should be constant and uniform but ...
Էջ 8
... measure of time which is called a day , and is what is pointed out to us by nature herself ; but as we are frequently in want of a much longer period , we are obliged to have recourse to other observations than those which depend upon ...
... measure of time which is called a day , and is what is pointed out to us by nature herself ; but as we are frequently in want of a much longer period , we are obliged to have recourse to other observations than those which depend upon ...
Էջ 22
... measurement of this large body was effected , as well as seve- ral other matters relating to the true figure of the ... measures they have given are considerably wide of the truth , as well as different from each other , yet this was ...
... measurement of this large body was effected , as well as seve- ral other matters relating to the true figure of the ... measures they have given are considerably wide of the truth , as well as different from each other , yet this was ...
Էջ 36
... measure uncertain ; we have , however , reason to conclude , that none of their diameters exceed four hundred miles , nor are less than a hundred miles . But , at present , no accurate estimate can be made of the time of their diurnal ...
... measure uncertain ; we have , however , reason to conclude , that none of their diameters exceed four hundred miles , nor are less than a hundred miles . But , at present , no accurate estimate can be made of the time of their diurnal ...
Էջ 54
... measures so far behind us , we find our- selves no nearer to a term or limit ; for all this is nothing to what may be displayed in the infinite expanse , beyond the remotest stars that have ever been discovered . In like manner , if we ...
... measures so far behind us , we find our- selves no nearer to a term or limit ; for all this is nothing to what may be displayed in the infinite expanse , beyond the remotest stars that have ever been discovered . In like manner , if we ...
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
Սիրված հատվածներ
Էջ 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.
Էջ 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?
Էջ 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.
Էջ 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.
Էջ 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.
Էջ 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.
Էջ 289 - His mirror, with full face borrowing her light From him, for other light she needed none In that...
Էջ 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.
Էջ 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.
Էջ 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.