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Recent Advances in Astronomy (Paperback) Loot Price: R240
Discovery Miles 2 400
Recent Advances in Astronomy (Paperback): Alfred Henry Fison
Recent Advances in Astronomy (Paperback): Alfred Henry Fison

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Recent Advances in Astronomy (Paperback)

Alfred Henry Fison

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Loot Price R240 Discovery Miles 2 400

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1898 Excerpt: ...some conception of the appearance presented may be formed. From the appearance of the country round Mount Hamilton as seen from the observatory, it was possible to imagine that, as viewed from a great altitude, this region, broken by canon, slope, and ridge, would closely resemble the surface of the Martian seas. During the observations the conviction seemed to force itself upon the observer that he was actually looking down from a great elevation upon just such a surface as that above which the observatory was situated. It appears, therefore, that if water exists at all upon Mars in the liquid form, it must be sought elsewhere than in the so-called seas; and it is possible that, in an observation made in 1894 by Mr. Lowell and Professor Pickering, its place upon the surface of the planet was revealed for the first time. During a careful study of Mars, when near its opposition in that year, with the aid of a fine refracting telescope of 18 inches of aperture, there appeared a dark belt forming a fringe to the south polar cap. The belt first appeared after rather more than a Martian month following the spring equinox of the planet. It was estimated as being the darkest marking on the disc, and appeared to be of a decidedly blue colour. As the polar cap dwindled, the belt followed, clinging to its edge. At midsummer upon Mars it was described as a barely discernible thread drawn round the minute white patch, which was all that then remained of the enormous snow-fields of some months before. Finally, when the cap vanished, the spot, where its girdle, long since too small for detection, had existed, had become one yellow stretch.1 That the belt seen upon this occasion was water, or at any rate liquid formed by the melting of the polar cap, appears a plausible s...


Imprint: Rarebooksclub.com
Country of origin: United States
Release date: May 2012
First published: March 2010
Authors: Alfred Henry Fison
Dimensions: 246 x 189 x 3mm (L x W x T)
Format: Paperback - Trade
Pages: 64
ISBN-13: 978-1-154-82681-4
Barcode: 9781154826814
Categories: Books
LSN: 1-154-82681-3

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