| Автор | Wise, Donald U. |
| Дата выпуска | 1969 |
| dc.description | Several major criticisms commonly claimed to invalidate theories of lunar origin by fission from the earth are shared by other lunar theories or are answerable by mechanisms associated with fission. Arguments based on the present rate of retreat, which require the moon to be a newcomer to the earth about 1.8 b.y. ago, are in direct conflict with the geologic record; MacDonald's calculations of the amount of tidal energy to be dissipated by lunar capture would require, in middle Precambrian time, surface temperatures of earth approaching those of the sun. One interpretation of his method of many‐moon capture to extend the time scale fails by at least two orders of magnitude. The simplest conclusion is that something is wrong with present rate‐of‐retreat determinations or projections. Discrepancies of present angular momentum of the earth‐moon system versus pre‐moon values for earth are almost as great for the retrograde capture theory as for the fission theory. The angular momentum at fission can be halved from earlier estimates by using a gravity‐stratified ellipsoid plus Chandrasekhar's calculation that all Jacobian ellipsoids are in unstable rotation. The entire remaining angular momentum discrepancy can be accounted for by escape of an incandescent silicate atmosphere volatilized by the huge tidal frictions immediately following fission. By the use of a reasonable set of assumptions, escape of 4% of the mass of the earth using ¾ of the available tidal energy can account for the entire angular momentum discrepancy. Goldreich's calculation of the history of the lunar orbit, with which he argues strongly against fission and against all other lunar theories as well, omits one significant possibility, that earth's equator had been tilted about 10° to the ecliptic prior to the time of fission. If this is true, the inclination of earth's equator and of the lunar orbit to the ecliptic fit nicely into Goldreich's curves. It is concluded that there are fewer outstanding criticisms of the hypothesis of lunar origin by fission than of other hypotheses. The average lunar density and the results of the Surveyor chemical analyses lead us to argue that fission from the earth triggered by the earth core formation is the most probable origin of the moon, considering the data available now. |
| Формат | application.pdf |
| Копирайт | Copyright 1969 by the American Geophysical Union. |
| Тема | COMPUTATIONAL GEOPHYSICS |
| Тема | Planetology: Gross properties of the Moon (size, shape, gravity, and magnetic fields) |
| Тема | Planetology: General or miscellaneous |
| Тема | SOLAR PHYSICS, ASTROPHYSICS, AND ASTRONOMY |
| Тема | General or miscellaneous |
| Название | Origin of the Moon from the Earth: Some new mechanisms and comparisons |
| Тип | article |
| DOI | 10.1029/JB074i025p06034 |
| Electronic ISSN | 2156-2202 |
| Print ISSN | 0148-0227 |
| Журнал | Journal of Geophysical Research |
| Том | 74 |
| Первая страница | 6034 |
| Последняя страница | 6045 |
| Выпуск | 25 |
| Библиографическая ссылка | Ahrens, L. H., Spectrochemical Analysis, 21, Addison‐Wesley, Reading, Mass., 1950. |
| Библиографическая ссылка | Alfven, H., The early history of the moon and the earth, Icarus, 1, 357–363, 1963. |
| Библиографическая ссылка | Allsopp, H. L., H. R.Roberts, G. D. L.Schreiner, Rb‐Sr age measurements on various Swaziland granites, J. Geophys. Res., 67, 5307–5313, 1962. |
| Библиографическая ссылка | Birch, F., Energetics of core formation, J. Geophys. Res., 70, 6217–6221, 1965. |
| Библиографическая ссылка | Brown, H., Rare gases and the formation of the earth's atmosphere, Atmosphere of the Earth and PlanetsG.Kuiper, 258–266, University of Chicago Press, Chicago, Ill., 1957. |
| Библиографическая ссылка | Cameron, A. G. W., Planetary atmosphere and the origin of the moon, The Earth‐Moon SystemB. S.Marsden, A. G. W.Cameron, 234, Plenum Press, New York, 1966. |
| Библиографическая ссылка | Chandrasekhar, S., The equilibrium and the stability of Roche ellipsoids, Astrophys. J., 138, 1182–1215, 1963. |
| Библиографическая ссылка | Darwin, G. H., On the secular change in elements of the orbit of a satellite revolving about a tidally distorted planet, Phil. Trans. Roy. Soc. London, 171, 713–891, 1880. |
| Библиографическая ссылка | Dicke, R. H., The sun's rotation and relativity, Nature, 202, 432, 1964. |
| Библиографическая ссылка | Gerstenkorn, Über Gezeitenreibung bei Zweikorpenproblem, Z. Astrophys., 26, 245–274, 1955. |
| Библиографическая ссылка | Goldreich, P., History of the lunar orbit, Rev. Geophys., 4, 411–439, 1966. |
| Библиографическая ссылка | Jeans, J. H., Astronomy and Cosmogeny, 206, Cambridge University Press, New York, 1929. |
| Библиографическая ссылка | Knopoff, L., Thermal convection in the earth's mantle, The Earth's MantleT. F.Gaskill, 171–196, Academic Press, New York, 1967. |
| Библиографическая ссылка | Limber, D. N., Surface forms and mass loss for the components of close binaries—general case of non‐synchronous rotation, Astrophys. J., 138, 1112–1133, 1963. |
| Библиографическая ссылка | MacDonald, G. J. F., Earth and moon: Past and future, Science, 145, 881–890, 1964a. |
| Библиографическая ссылка | MacDonald, G. J. F., Tidal friction, Rev. Geophys., 2, 467–541, 1964b. |
| Библиографическая ссылка | MacDonald, G. J. F., The deep structure of continents, Science, 143, 921–929, 1964c. |
| Библиографическая ссылка | MacDonald, G. J. F., Origin of the moon: Dynamical considerations, The Earth‐Moon SystemsB. S.Marsden, A. G. W.Cameron, 165–209, Plenum Press, New York, 1966. |
| Библиографическая ссылка | Modisette, J. L., Solar wind induced torque on the sun, J. Geophys. Res., 72, 1521–1526, 1967. |
| Библиографическая ссылка | Muller, P. M., W. L.Sjogren, Mascons: Lunar mass concentrations, Science, 161, 680–684, 1968. |
| Библиографическая ссылка | Nicolaysen, L. O., Stratigraphic interpretation of age measurements in Southern Africa, Petrologic Studies, Buddington Volume, 569–598, Geological Society of America, New York, 1962. |
| Библиографическая ссылка | Pannella, G., C.MacClintock, M.Thompson, Paleontological evidence of variations in length of synodic month since late Cambrian, Science, 162, 792–796, 1968. |
| Библиографическая ссылка | Ringwood, A. E., Some aspects of the thermal evolution of the earth, Geochim. Cosmochim. Acta, 20, 241–249, 1960. |
| Библиографическая ссылка | Ringwood, A. E., Composition and origin of the earth, Advances in Earth ScienceP. M.Hurley, 333, M.I.T. Press, Cambridge, 1964. |
| Библиографическая ссылка | Schopf, J. W., E. S.Barghoorn, Alga‐like fossils from the early Precambrian of South Africa, Science, 156, 508–512, 1967. |
| Библиографическая ссылка | Tozer, D. C., Towards a theory of thermal convection in the earth's mantle, The Earth's MantleT. F.Gaskill, 325–353, Academic Press, New York, 1967. |
| Библиографическая ссылка | Urey, H., The Planets, Their Origin and Development, 245, Yale University Press, New Haven, Conn., 1952. |
| Библиографическая ссылка | Urey, H. C., Mascons and the history of the moon, Science, 162, 1408–1410, 1968. |
| Библиографическая ссылка | Vine, F., Spreading of the ocean floor, new evidence, Science, 154, 1405–1415, 1966. |
| Библиографическая ссылка | Weber, E. J., L.Davis, The angular momentum of the solar wind, Astrophys. J., 148, 217–227, 1967. |
| Библиографическая ссылка | Wilson, J. T., Theories of building continents, The Earth's MantleT. F.Gaskill, 445–473, Academic Press, New York, 1967. |
| Библиографическая ссылка | Wise, D. U., An origin of the moon by rotational fission during formation of earth's core, J. Geophys. Res., 68, 1547–1554, 1963. |
| Библиографическая ссылка | Wise, D. U., Origin of the moon by fission, The Earth‐Moon SystemB. S.Marsden, A. G. W.Cameron, 213–223, Plenum Press, New York, 1966. |
| Библиографическая ссылка | Wise, D. U., M.Yates, Mascons as structural relief on a lunar Moho (abstract), Trans. Amer. Geophys. Union, 50, 125, 1969. |
