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 35
... falls on the mirror is absorbed than is lost in passing through the object - glass of a refractor ; and hence the larger achro- matic telescopes afford a stronger light than the reflect- ing , unless the latter are made of an enormous ...
... falls on the mirror is absorbed than is lost in passing through the object - glass of a refractor ; and hence the larger achro- matic telescopes afford a stronger light than the reflect- ing , unless the latter are made of an enormous ...
Strona 54
... fall upon the circumference of the circle at some hour before noon , as about ten o'clock . Make a small dot at the point where the end of the shadow falls upon the circle , and do the same where it falls upon it again in the afternoon ...
... fall upon the circumference of the circle at some hour before noon , as about ten o'clock . Make a small dot at the point where the end of the shadow falls upon the circle , and do the same where it falls upon it again in the afternoon ...
Strona 63
... fall on the twenty - third ; and in process of time , it would fall successively on every day of the year . The same would be true of any other fixed date . Julius Cæsar , who was distinguished alike for the variety TIME AND THE ...
... fall on the twenty - third ; and in process of time , it would fall successively on every day of the year . The same would be true of any other fixed date . Julius Cæsar , who was distinguished alike for the variety TIME AND THE ...
Strona 65
... falling into confusion afterwards , he prescribed the following rule : Every year whose number is not divisible by four , without a remainder , consists of three hundred and sixty - five days ; every year which is so divisible , but is ...
... falling into confusion afterwards , he prescribed the following rule : Every year whose number is not divisible by four , without a remainder , consists of three hundred and sixty - five days ; every year which is so divisible , but is ...
Strona 67
... fall into inextricable confusion . To change the ob- servance of certain religious feasts , which have been long fixed to particular days , is looked upon as an im- pious innovation ; and though the times of the events , upon which ...
... fall into inextricable confusion . To change the ob- servance of certain religious feasts , which have been long fixed to particular days , is looked upon as an im- pious innovation ; and though the times of the events , upon which ...
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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