Download Pleasures of the telescope;: An illustrated guide for by Garrett Putman Serviss PDF

By Garrett Putman Serviss

Initially released in 1915, via the creation of a whole sequence of big name maps, drawn specifically for using the beginner and dispensed in the course of the physique of the paintings, hence facilitating session, it really is believed that this ebook makes a step prior to its predecessors. The maps exhibit the entire stars obvious to the bare eye within the areas of the sky represented, and, moreover, a few stars that could basically be obvious with optical relief. The latter were positioned within the maps as advisor posts within the telescopic box to help those people who are looking for faint and inconspicious items mentioned within the textual content. because the booklet was once now not written should you own the equiptment of an observatory, with telescopes pushed through clockwork and supplied with graduated circles, correct ascensions and declinations should not given. the entire telescopic phenomena defined are, besides the fact that represented within the maps...Many of the earliest books, rather these relationship again to the 1900's and prior to, at the moment are e

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Extra info for Pleasures of the telescope;: An illustrated guide for amateur astronomers and a popular description of the chief wonders of the heavens for general readers,

Sample text

It was form with the Lick telescope on had sunk to the lowest limit of visibilApril 26th, To everybody's astonishment it reappeared in the ity. following August, and on the 17th of that month was seen shining with the light of a tenth-magnitude star, but prelast seen in its original when it senting the spectrum of a nebula! Its visual appearance in the great telescope was now also that of a planetary nebula. Its spectrum during the first period of its visi- had been carefully studied, so that the means existed for making a spectroscopic comparison of the phenomenon in its two phases.

Assuming that we have a telescope vious fault is discernible, the next thing Two VIEWS OF MARS IN The smaller with a three-and-three-eighths-inch telescope ers in actual work. to describe In what is ; in is which no ob- to test its pow- the larger with a nine-inch. to follow I shall endeavor some of the principal objects in the heavens the amateur observer may expect to derive from which pleasure and instruction, and which may at the same time 18 PLEASURES OF THE TELESCOPE serve as tests of the excellence of his telescope.

But what was the meaning of all this? Evidently a catastrophe of some kind had occurred out there in space. The idea of a collision involving the transformation of the energy of motion into that of light and heat suggests itself at once. But what were the circumstances of the collision? Did an extinguished sun, flying blindly through space, plunge into a vast cloud of meteoric particles, and, under the lashing impact of so many myriads of missiles, break into superficial incandescence, while the cosmical wrack through which it had driven remained glowing with nebulous luminosity?

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