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 |
Z wnętrza książki
Wyniki 1 - 5 z 70
Strona 13
... given to these objects as to the constellations , and he seems to himself , at times , when he has penetrated into the remotest depths of ether , to enjoy the high prerogative of holding converse with the celestials . It is no small ...
... given to these objects as to the constellations , and he seems to himself , at times , when he has penetrated into the remotest depths of ether , to enjoy the high prerogative of holding converse with the celestials . It is no small ...
Strona 17
... given , I must re- call to your recollection a few particulars respecting the method of measuring angles . ( See Fig . 1 , page 18. ) A line drawn from the centre to the circumference of a circle is called a radius , as C D , C B , or C ...
... given , I must re- call to your recollection a few particulars respecting the method of measuring angles . ( See Fig . 1 , page 18. ) A line drawn from the centre to the circumference of a circle is called a radius , as C D , C B , or C ...
Strona 41
... given instrument , we diminish both the illumination and the field of view . Still , different objects require different magnifying pow- ers ; and a telescope is usually furnished with several varieties of powers , one of which is best ...
... given instrument , we diminish both the illumination and the field of view . Still , different objects require different magnifying pow- ers ; and a telescope is usually furnished with several varieties of powers , one of which is best ...
Strona 48
... given towards the close of these Letters . Six assistants , besides inferior laborers , are constant- ly in attendance ; and the business of making and re- cording observations is conducted with the utmost sys- tem and order . The great ...
... given towards the close of these Letters . Six assistants , besides inferior laborers , are constant- ly in attendance ; and the business of making and re- cording observations is conducted with the utmost sys- tem and order . The great ...
Strona 52
... given intervals . Now , the clock shows us exactly this amount ; for , when regulated to sidereal time , ( as it easily may be , ) the hour - hand keeps ex- act pace with the equator , revolving once on the dial- plate of the clock ...
... given intervals . Now , the clock shows us exactly this amount ; for , when regulated to sidereal time , ( as it easily may be , ) the hour - hand keeps ex- act pace with the equator , revolving once on the dial- plate of the clock ...
Inne wydania - Wyświetl wszystko
Kluczowe wyrazy i wyrażenia
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