The Soviet-American Conference on Cosmochemistry of the Moon and Planets, المجلد 2John Howard Pomeroy, Norman J. Hubbard National Aeronautics and Space Administration, Scientific and Technical Information Office, 1977 - 929 من الصفحات |
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طبعات أخرى - عرض جميع المقتطفات
عبارات ومصطلحات مألوفة
16 and Luna abundances accretion albedo Allende ANDERS anorthosite Apollo 16 asteroids b.y. ago basins bodies breccias carbonaceous chondrites chemical clasts comets component composition condensation cosmic rays Cosmochimica Acta crystals curve depth diameter distribution Earth Planet ejecta exposure age Figure flux formation Fourth Lunar Science fraction fragments Geochimica et Cosmochimica glass grains highland Imbrium impact velocity initial iron isotopic J. W. MORGAN km/s layer light-gray breccia Luna 16 Luna 20 lunar rocks Lunar Samples Lunar Science Conference Lunar Science Institute lunar soil lunar surface Lunokhod mass material measurements ments meteoritic meteoroid microcraters micrometeoroid mineral Moon olivine orbits particles percent plagioclase planetary planetesimals Proc projectile pyroxene ratio Rb-Sr regolith relative satellite siderophile silicate solar nebula solar system South Ray Crater spectra studies Supplement temperature terrestrial Third Lunar Science tion Trace Elements track density troctolites volatiles zone
مقاطع مشهورة
الصفحة 820 - D., and Wasserburg GJ (1973) A lunar cataclysm at -3.95AE and the structure of the lunar crust (abstract).
الصفحة 538 - Noble Gas Abundances in Lunar Material. Cosmic Ray Spallation Products and Radiation Ages From the Sea of Tranquility and the Ocean of Storms. J. Geophys. Res., Vol. 76, 1971, p.
الصفحة 522 - Vol. 54, 1973, p. 582. 52. REID, AM, GE LOFGREN, GH HEIKEN, RW BROWN, AND G. MORELAND, Apollo 17 Orange Glass, Apollo 15 Green Glass and Hawaiian Lava Fountain Glass. EOS, Trans. Am. Geophys. Union, Vol. 54, 1973, pp. 606-607. 53. ANDERSON, DL, The Composition and Origin of the Moon. Earth Planet.
الصفحة 924 - Cloud is highly attractive except for the difficulty of agglomerating kilometer 628 sized bodies in the low-density fragmented interstellar clouds. Such a possibility must be demonstrated before one can accept the tempting solution to the problem. Opik (1973) finds the process quite impossible. Let us now look to the comets themselves to see whether their structure can help us distinguish between the two possible regions of origin. Most conspicuous are the numerous carbon radicals, molecules and...
الصفحة 520 - RO ALLEN, PA HELMKE, TP PASTER, MR ANDERSON, RL KOROTEV AND KA ZWEIFEL, Rare-Earth and Other Trace Elements in Apollo 11 Lunar Samples. Proceedings of the Apollo 11 Lunar Science Conference, Vol.
الصفحة 891 - Department of Earth and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139.
الصفحة 655 - LAUL, JC, H. WAKITA, DL SHOWALTER, W. V. BOYNTON, AND RA SCHMITT, Bulk, Rare Earth, and Other Trace Elements in Apollo 14 and 15 and Luna 16 Samples. Proc. Third Lunar Science Conference, Geochimica et Cosmochimica Acta, Supplement 3, Vol.
الصفحة 655 - Classification and source of lunar soils; clastic rocks; and Individual mineral, rock, and glass fragments from Apollo 12 and 14 samples as determined by the concentration gradients of the helium, neon, and argon Isotopes...
الصفحة 924 - ... Everhart's doubts may possibly be removed if the space density of comets originally fell off rapidly with solar distance and that the supply at great distances (Marsden and Sekanina, 1973) has been replenished by those in smaller orbits, more stable against stellar perturbations. Indeed Opik (1932) showed that stellar perturbations will systematically increase perihelion distances to remove the comets from the region of perturbation by the outer planets. The number of comets thrown into the inner...
الصفحة 925 - At present then, we have no criterion to identify the unique region in space where comets formed — if, indeed, they all formed in the same general region. We need more precise knowledge concerning the identity and abundances of the more volatile parent molecules. Did CH4, CO, Ar, or Ne, for example actually freeze out in comets?