School Atlas of Astronomy: Comprising, in Twenty-one Plates, a Complete Series of Illustrations of the Heavenly BodiesWilliam Blackwood and sons, 1869 - 70 strani |
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Stran 59
... Nebula - Maps of the Stars . When the stellar vault is surveyed on a fine clear night , the number of luminaries which spangle on its surface appears to be inconceivably great . This , however , turns out to be an erroneous impression ...
... Nebula - Maps of the Stars . When the stellar vault is surveyed on a fine clear night , the number of luminaries which spangle on its surface appears to be inconceivably great . This , however , turns out to be an erroneous impression ...
Stran 63
... nebula , and it was not until Sir William Herschel examined it with the powerful telescopes of his own construction that it was found to consist in reality of a cluster of closely - congregated stars . Herschel has estimated the number ...
... nebula , and it was not until Sir William Herschel examined it with the powerful telescopes of his own construction that it was found to consist in reality of a cluster of closely - congregated stars . Herschel has estimated the number ...
Stran 65
... Nebula of Orion . - This nebula was first made known to the scientific world generally by- the celebrated Dutch astronomer Huyghens , 1656 ; but it appears from recent historical re- searches that it was seen by Cysatus , a Swiss ...
... Nebula of Orion . - This nebula was first made known to the scientific world generally by- the celebrated Dutch astronomer Huyghens , 1656 ; but it appears from recent historical re- searches that it was seen by Cysatus , a Swiss ...
Stran 66
... nebula , like that of Orion , has offered some faint indications of resolvability , but in neither case has it been really established whether the nebula is merely an agglomeration of stars , or whether it is composed of some ...
... nebula , like that of Orion , has offered some faint indications of resolvability , but in neither case has it been really established whether the nebula is merely an agglomeration of stars , or whether it is composed of some ...
Stran 70
... Nebula . - Nebulæ , when subjected to the analysis of the spectroscope , have been found to exhibit merely a few bright lines indicative of a gaseous structure . This is true , however , only in regard to what may be considered as ...
... Nebula . - Nebulæ , when subjected to the analysis of the spectroscope , have been found to exhibit merely a few bright lines indicative of a gaseous structure . This is true , however , only in regard to what may be considered as ...
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amounts angle angular apparent diameter apparent paths apparent position apparition appear astronomers Atlas atmosphere axis body brightness celestial object celestial sphere centre circle circumstance comet constellation dark lines direction discovered discovery diurnal motion double star earth's orbit earth's surface ecliptic Edinburgh & London Engraved & Printed equator excentricity exhibits greatest heavens Herschel horizon inches inferior conjunction inferior planets instance Jupiter KEITH JOHNSTON light longitude magnitude Maps Mars mean distance mean solar Mercury meridian meteors millions of miles minor planets moon moon's motion movements naked eye nebula Neptune night node observations opposite passing perihelion phenomena planet revolves Printed in Colours rays refraction remarkable represented result revolving round right ascension ring round the sun satellites Saturn seen shadow shooting stars sidereal solar parallax solar spectrum south pole southern hemisphere spots sun's disc superior planets suppose synodic revolution telescope termed total eclipse Uranus velocity Venus visible William Blackwood
Priljubljeni odlomki
Stran 17 - The squares of the periods of revolution of any two planets are proportional to the cubes of their mean distances from the sun.
Stran 70 - Director-General of the Geological Survey of Great Britain and Ireland ; and JAMES NICOL, FRSE, FGS, Professor of Natural History in the University of Aberdeen. Constructed by ALEX. KEITH JOHNSTON, FRSE, &c., Geographer to the Queen, Author of the "Physical Atlas,