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 13
... length finds him- self , whenever he sweeps his telescope over the firma- ment , greeted by smiles , unperceived and unknown to his fellow - mortals . The same personification is given to these objects as to the constellations , and he ...
... length finds him- self , whenever he sweeps his telescope over the firma- ment , greeted by smiles , unperceived and unknown to his fellow - mortals . The same personification is given to these objects as to the constellations , and he ...
Strona 18
... length . Thus , if the arc A B contains forty de- grees , then the opposite angle A C B is said to be an angle of forty degrees , and to be measured by A B. But this arc is the same part of the smaller circle that EF is of the greater ...
... length . Thus , if the arc A B contains forty de- grees , then the opposite angle A C B is said to be an angle of forty degrees , and to be measured by A B. But this arc is the same part of the smaller circle that EF is of the greater ...
Strona 36
... length or height of a house , and the breadth of a hogshead or cistern , of known dimensions . The reflector alone weighed nearly a ton . So large and ponderous an instrument must require a vast deal of machinery to work it , and to ...
... length or height of a house , and the breadth of a hogshead or cistern , of known dimensions . The reflector alone weighed nearly a ton . So large and ponderous an instrument must require a vast deal of machinery to work it , and to ...
Strona 37
... length , fourteen feet . Although the price of this in- strument was nearly five thousand dollars , yet it is said that this sum barely covered the actual expenses . It weighs five thousand pounds , and yet is turned with the finger ...
... length , fourteen feet . Although the price of this in- strument was nearly five thousand dollars , yet it is said that this sum barely covered the actual expenses . It weighs five thousand pounds , and yet is turned with the finger ...
Strona 54
... length , that the termination of its shadow shall 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 ...
... length , that the termination of its shadow shall 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 ...
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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