Letters on Astronomy, Addressed to a Lady: in which the Elements of the Science are Familiarly Explained in Connexion with Its Literary History: With Numerous Engravings |
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Page 41
... double stars , ( stars which ap- pear single to the naked eye , but double to the tele- scope , ) we require very high magnifiers , in order to separate these minute objects so far from each other , that the interval can be distinctly ...
... double stars , ( stars which ap- pear single to the naked eye , but double to the tele- scope , ) we require very high magnifiers , in order to separate these minute objects so far from each other , that the interval can be distinctly ...
Page 381
... star has returned , constituting one of the periodical or variable stars of a long period . Moreover , on a careful reexamination of the heavens , and a compari- son of catalogues , many stars are now discovered to be missing . DOUBLE STARS ...
... star has returned , constituting one of the periodical or variable stars of a long period . Moreover , on a careful reexamination of the heavens , and a compari- son of catalogues , many stars are now discovered to be missing . DOUBLE STARS ...
Page 382
... double stars , the determination of which involved the distinct and most minute inspec- tion of at least one hundred and twenty thousand stars . Sir John Herschel , in his recent survey of the southern hemisphere , is said to have added ...
... double stars , the determination of which involved the distinct and most minute inspec- tion of at least one hundred and twenty thousand stars . Sir John Herschel , in his recent survey of the southern hemisphere , is said to have added ...
Page 383
... stars separate systems , composed of two stars revolving about each other in regular orbits . These he denominated binary stars , to distinguish them from other double stars where no such motion is detected , and whose proximity to each ...
... stars separate systems , composed of two stars revolving about each other in regular orbits . These he denominated binary stars , to distinguish them from other double stars where no such motion is detected , and whose proximity to each ...
Page 384
... double star around the other , should be deemed facts of such extraordinary interest ; to you they may appear rather in the light of astronom- ical curiosities . But remark , that the revolutions of the binary stars have assured us of ...
... double star around the other , should be deemed facts of such extraordinary interest ; to you they may appear rather in the light of astronom- ical curiosities . But remark , that the revolutions of the binary stars have assured us of ...
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Common terms and phrases
angle appear ascertain astronomers atmosphere attraction axis called celestial centre circle comet conjunction constellation degrees diameter direction discovery disk distance diurnal motion diurnal revolution doctrine double stars earth ecliptic equal equator equinox exhibit fact fixed stars force Galileo globe gravity greater greatest half Halley's comet heavenly bodies heavens Hence Herschel horizon 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 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 solar system 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