Popular Astronomy: Being the New Descriptive Astronomy

Popular Astronomy: Being the New Descriptive Astronomy

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Popular Astronomy: Being the New Descriptive Astronomy

Popular Astronomy: Being the New Descriptive Astronomy

Read FREE!

Excerpt

In revising Steele Descriptive Astronomy I have aimed to preserve all the highly desirable features of the author's original work, making but few excisions of importance. Nor have essentials been modified, either in style or in general arrangement.

In bringing the book well down to the present date, the necessary changes and additions have been numerous, on account of the rapid advance of practical and physical astronomy during the last fifteen years. Principally they relate to Rowland's research on the solar spectrum; Seechi's and Pickering's classification of stellar spectra; Hale's and Deslandres's researches on the sun; Spoerer's law of sun-spot zones; solar eclipses, past and future; standard time and change of the day; new methods for finding the sun's distance; transits of Mercury; researches on the surfaces of planets and satellites; Chandler's variation of terrestrial latitudes; Eros, the nearest planet; Pickering's ninth satellite of Saturn; Keeler's constitution of Saturn's rings; Bredichin's theory of cometary tails; observations of the Gegenschein, or counterglow; Nova Aurigæ of 1892; See's researches on the cosmogony; and Kapteyn's theory of the visible universe.

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