The Observatory Volume . 6-7

The Observatory Volume . 6-7

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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. 1883 edition. Excerpt: ...observers who make them objects of study are, at the outset, very liable to be misled; hence we have occasional records of stupendous changes occurring in incredibly short times, but such descriptions generally bear their own condemnation and are rejected accordingly. Prof. Hough will have to seek another theory to account for the singularly rapid variation in some of the markings observed during recent years. I believe that in certain cases the different rotation periods of the spots originate a source whence real changes have been too hastily inferred; but if we disintegrate the evidence before us, and rely only upon what is rendered conclusive by unequivocal and corroborative testimony, we must perforce allow that surprising changes occur in the appearance of the markings. Some of these markings may be fairly permanent, it is true, and not liable to rapid variations, as, for example, the red spot; others, of temporary character, may be affected in different degree: it should now be our endeavour to discover the character and origin of these phenomena. The direct evidence of our telescopes warrants the conclusion that the atmospheric envelopes of this planet are in a state of great disturbance, especially in the equatoreal regions, and furrowed by a remarkable series of longitudinal currents, in which rapid changes are evident. I am, Sir, Yours faithfully, Bristol, 1883, November 3. W. F. DEnn1nG. P.S.--With regard to Mr. Corder's query ('Observatory, ' Nov., P-3.39)1 I observed Jupiter on the morning of October 15. At 3h 55m the ouly satellites visible were the third and fourth, hanging upon the E. and W. limbs of the planet. At 4h the fourth had completed its egress and was obviously much in advance of the. time given in the 'Nautical Almanac'..
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Product details

  • Paperback | 322 pages
  • 189 x 246 x 17mm | 576g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236562542
  • 9781236562548