Meteoric Astronomy: A Treatise on Shooting-stars, Fire-balls, and Aerolites

כריכה קדמית
J.B. Lippincott & Company, 1867 - 129 עמודים

מתוך הספר

מהדורות אחרות - הצג הכל

מונחים וביטויים נפוצים

קטעים בולטים

עמוד 19 - Bonpland relates, that from the beginning of the phenomenon, there was not a space in the firmament equal in extent to three diameters...
עמוד 125 - As the sun in his progressive motion approaches a cometary group, the latter must, by reason of his attraction, move toward the centre of our system, the nearer members with greater velocity than the more remote. Those of the same cluster would enter the solar domain at periods not very distant from each other — the forms of their orbits depending upon their original relative positions with reference to the sun's course, and also on planetary perturbation.
עמוד 45 - Twenty-three distinct detonations were heard, after which the sounds became blended together and were compared to the rattling fire of an awkward squad of soldiers, and by others to the roar of a railway train. These sounds, with their reverberations, are thought to have continued for two minutes. The last sounds seemed to come from a point in the southeast 45° below the zenith. The result of this cannonading was the falling of a large number of stony meteorites upon an area of about ten miles long...
עמוד 115 - But if one of them was sufficiently powerful to unite successively by its attraction all the others about its centre, the ring of vapours would be changed into one sole spheroidical mass, circulating about the Sun, with a motion of rotation in the same direction with that of revolution.
עמוד 18 - And afterward they fell from the sky in such numbers, and so thickly together, that as they descended low in the air, they seemed large and fiery, and the sky and the air seemed to be in flames, and even the earth appeared as if ready to take fire. That portion of the sky where there were no stars seemed to be divided into many parts, and this lasted for a long time.
עמוד 91 - With regard to the store of chemical force in the sun, we can form no conjecture, and the store of heat there existing can only be determined by very uncertain estimations. If, however, we adopt the very probable view, that the remarkably small density of so large a body is caused by its high temperature, and may become greater in time, it may be calculated that if the diameter of the sun were diminished only the tenthousandth part of its present length, by this act a sufficient quantity of heat...
עמוד 19 - Towards the morning of the 13th of November, 1799, we witnessed a most extraordinary scene of shooting meteors. Thousands of bodies and falling stars succeeded each other during four hours. Their direction was very regular from north to south. From the beginning of the phenomenon there was not a space in the firmament equal in extent to three diameters of the moon which was not filled every instant with bodies or falling stars. All the meteors left luminous traces or phosphorescent bands behind them,...

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