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 18
... side which is opposite to it . Thus , in the triangle A C K , the angle at C is subtended by the side A K , the angle at A by CK , and the angle at K by C A. In like man- ner , a side is said to be subtended by 18 LETTERS ON ASTRONOMY .
... side which is opposite to it . Thus , in the triangle A C K , the angle at C is subtended by the side A K , the angle at A by CK , and the angle at K by C A. In like man- ner , a side is said to be subtended by 18 LETTERS ON ASTRONOMY .
Strona 19
... side is said to be subtended by an angle , as A K by the angle at C. Let us now proceed with the doctrine of the sphere . A section of a sphere , by a plane cutting it in any manner , is a circle . Great circles are those which pass ...
... side is said to be subtended by an angle , as A K by the angle at C. Let us now proceed with the doctrine of the sphere . A section of a sphere , by a plane cutting it in any manner , is a circle . Great circles are those which pass ...
Strona 25
... side of the eclip- tic . This portion of the heavens is thus marked off by itself , because all the planets move within it . After endeavoring to form , from the definitions , as clear an idea as we can of the various circles of the ...
... side of the eclip- tic . This portion of the heavens is thus marked off by itself , because all the planets move within it . After endeavoring to form , from the definitions , as clear an idea as we can of the various circles of the ...
Strona 28
... side of the plane of projection . In the same manner , P R P , an hour circle , is represented by an ellipse on the plane of projection . LETTER III . ASTRONOMICAL INSTRUMENTS . - TELESCOPE . " 28 LETTERS ON ASTRONOMY .
... side of the plane of projection . In the same manner , P R P , an hour circle , is represented by an ellipse on the plane of projection . LETTER III . ASTRONOMICAL INSTRUMENTS . - TELESCOPE . " 28 LETTERS ON ASTRONOMY .
Strona 45
... side being sixty feet , and of large wings in the form of round towers . The whole was executed in a style of great magnificence , and Tycho , who was a nobleman by descent , gratified his taste for splendor and ornament , by giving to ...
... side being sixty feet , and of large wings in the form of round towers . The whole was executed in a style of great magnificence , and Tycho , who was a nobleman by descent , gratified his taste for splendor and ornament , by giving to ...
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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