Letters on Astronomy: Addressed to a Lady; in which the Elements of the Science are Familiarly Explained in Connexion with Its Literary HistoryMarsh, Capen, Lyon and Webb, 1841 - 419 |
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Strona 12
... objects , while they are contracted and weakened by being constantly employed upon little or trifling sub- jects . The former elevate , the latter depress , the mind , to their own level . Now , every thing in as- tronomy is great . The ...
... objects , while they are contracted and weakened by being constantly employed upon little or trifling sub- jects . The former elevate , the latter depress , the mind , to their own level . Now , every thing in as- tronomy is great . The ...
Strona 13
... objects of his attachment desert him ; the face of society changes ; the earth presents new features ; but the same sun illumines the day , the same moon adorns the night , and the same bright stars still attend him . When , moreover ...
... objects of his attachment desert him ; the face of society changes ; the earth presents new features ; but the same sun illumines the day , the same moon adorns the night , and the same bright stars still attend him . When , moreover ...
Strona 15
... objects , as we imag- ine the shore is receding from us , when we are uncon- scious of the motion of the ship that carries us from it . Although many of the appearances , presented by the motions of the heavenly bodies , may be ...
... objects , as we imag- ine the shore is receding from us , when we are uncon- scious of the motion of the ship that carries us from it . Although many of the appearances , presented by the motions of the heavenly bodies , may be ...
Strona 17
... object is to teach what is known respecting the sun , moon , planets , com- ets , and fixed stars ; and also to explain the methods by which this knowledge is acquired . Astronomy is some- times divided into descriptive , physical , and ...
... object is to teach what is known respecting the sun , moon , planets , com- ets , and fixed stars ; and also to explain the methods by which this knowledge is acquired . Astronomy is some- times divided into descriptive , physical , and ...
Strona 30
... object , or how many degrees it lies east or west of the meridian . It is obvious , that the larger the graduated circle is , the more minutely its limb may be divided . If the cir- cle is one foot in diameter , each degree will occupy ...
... object , or how many degrees it lies east or west of the meridian . It is obvious , that the larger the graduated circle is , the more minutely its limb may be divided . If the cir- cle is one foot in diameter , each degree will occupy ...
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angle appear ascertain astronomers atmosphere attraction axis called celestial centre circle comet conjunction constellation degrees diameter direction discovery disk distance diurnal motion doctrine double stars earth ecliptic equal equator equinox exhibited fact fixed stars force Galileo globe gravity greater greatest half Halley's comet heavenly bodies heavens Hence Herschel horizon hundred inferior conjunction instrument John Herschel Jupiter Kepler latitude laws length less light longitude lunar lunar eclipse magnitude measure Mercury meridian meteors millions of miles minutes moon moon's motion move Nature nearer nearly node objects observations opposite orbit parallax passing perihelion period phenomena planetary planets pole respect revolve right ascension ring round satellites Saturn seen shadow side space spectator sphere sun's superior planets supposed surface telescope thousand tides tion truth Tycho Tycho Brahe universal gravitation Uranus velocity Venus vernal equinox visible west to east