By Paul J. Thomas, Christopher F. Chyba, Christopher P. McKay
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Science, 249, 366-373. F. , and Zahnle, KJ. (1993), The 1908 Tunguska explosion: Atmospheric disruption of a stony asteroid. Nature, 361, 40-44. J. Oro and A. C. (1988), Primeval procreative comet pond. Origins Life, 18, 209-238. M. (1992), Modem life at high temperatures. Origins Life, 22, 33-42. A. (1984), Extinction of species by periodic comet showers. Nature, 308, 715-717. H. (1984), The cometary connection with periodic chemistry. Origins Life, 14,51-60. H. (1991), Nature and history of the organic compounds in comets: An astrophysical view.
In S. ), Early Life on Earth. Nobel Symposium No. 84. (Columbia University Press, New York), pp. 152160. F. (1990), Bolide impacts and the oxidation state of carbon in the Earth's earliest atmosphere. Origins Life, 20, 199-231. Kasting. F. (1993), Earth's earliest atmosphere. Science, 259, 920--926. A. (1985), Periodic extinctions and impacts challenged. Science, 227,1451-1453. , Sagan, C. , and Nagy, B. (1984), The Organic aerosols of Titan. Adv. , 4, (12) 59-68. Kissel, J. and Krueger, ER. (1987), The organic component in dust from comet Halley as measured by the PUMA mass spectrometer on board Vega 1.
Although the evidence is indirect, the infrared spectra of asteroids seem to imply that the dark C asteroids have carbonaceous chondritic surfaces, whereas the five light asteroids look more like ordinary chondrites. See, however, the controversy about the identification of the five asteroids in Wetherill and Chapman (1988). 6 AU (Morrison, 1977). The silicate matrix of chondrites shows that it was made by a moderate compression of fine dust grains of different origins. In spite of their close contact, these often submicrometer-sized grains are chemically unequilibrated.