Cosmos: A Sketch of a Physical Description of the Universe, Volumen 3H.G. Bohn, 1852 |
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Términos y frases comunes
according æther already appear Arago Argelander astronomers atmosphere belong Bessel brightness Cassini catalogue celestial central body centre century clusters of stars colour conjecture constellation cosmical Cosmos Cygni dark Decl degree density determined diameter discovered discovery disk distance double stars Earth ecliptic epoch excentricity fixed stars Galileo geographical miles heavenly bodies hemisphere Hipparchus intensity Jupiter Kepler Lacaille luminous Lyræ Mädler magnifying powers Mars mass mean measurements Mercury meteoric Milky Moon multiple stars naked eye nature nebula Neptune observations optical orbits Orion parallax periods of revolution phænomena phænomenon photosphere physical planetary present primary planets principal star proper motion recognised regarded remarked respecting Right Ascension ring rotation round satellites Saturn seen shew shining sidereal Sir John Herschel Sirius small planets solar spots solar system southern heavens space sphere Struve Sun's surface telescope terrestrial tion Tycho Brahe Uranus variable stars velocity Venus visible William Herschel Zodiacal Light
Pasajes populares
Página 393 - But to derive two or three general principles of motion from phaenomena, and afterwards to tell us how the properties and actions of all corporeal things follow from those manifest principles, would be a very great step in philosophy, though the causes of those principles were not yet discovered. And therefore I scruple not to propose the principles of motion above mentioned, they being of very general extent, and leave their causes to be found out.
Página 461 - ... we could plainly see that all about the trapezium is a mass of stars ; the rest of the nebula also abounding with stars and exhibiting the characteristics of resolvability strongly marked.
Página 397 - ... of those great deposits of dynamical efficiency which are laid up for human use in our coal strata. By them the waters of the sea are made to circulate in vapour through the air, and irrigate the land, producing springs and rivers.
Página 461 - ... reflector broken up into masses , whose mottled and curdling light evidently indicates , by a sort of granular texture , its consisting of stars, and when examined under the great light of Lord ROSSE'S reflector, or the exquisite defining power of the great achromatic at Cambridge, US, is evidently perceived to consist of clustering stars.
Página 393 - I do not here consider. What I call attraction may be performed by impulse, or by some other means unknown to me. I use that Word here to signify only in general any Force by which Bodies tend towards one another, whatsoever be the Cause.
Página 461 - I think I may safely say, that there can be little, if any, doubt as to the resolvability of the nebula.
Página 461 - Rosse's reflector, or the exquisite defining power of the great achromatic at Cambridge, US, is evidently perceived to consist of clustering stars. There can therefore be little doubt as to the whole consisting of stars, too minute to be discerned individually even with these powerful aids, but which become visible as points of light when closely adjacent in the more crowded parts in the mode already more than once suggested.
Página xlix - Arago signale la comparaison de l'intensité lumineuse de la portion de la Lune, que les rayons solaires éclairent directement, avec celle de la partie du même astre qui reçoit seulement les rayons réfléchis par la Terre. Il croit, d'après les expériences qu'il a déjà tentées à cet égard, qu'on pourra avec des...
Página xxiii - Now from the sixth hour there was darkness over all the land unto the ninth hour.