Cosmology

Comets and the Origin and Evolution of Life by Paul J. Thomas, Christopher F. Chyba, Christopher P. McKay

By Paul J. Thomas, Christopher F. Chyba, Christopher P. McKay

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I-II (Dordrecht, Boston), pp. 439-462. N. and Ludicky, R. (1986), The dark nucleus of comet Halley: Hydrogen cyanide polymers. In B. J. Rolfe, and R. Reinhard (eds), 20th ESLAB Symposium on the Exploration of Halley's Comet (ESA Report SP-250), pp. 273-277. , and Church, F. (1989), Shock production of organics during cometary impacts. Lunar Planet. Sci. Con! XX, 671-672. B. (1989), Impacts giveth and impacts taketh away. Nature, 338, 465-466. Melosh, J. and Vickery, A. (1989), Impact erosion of the primordial Martian atmosphere.

G. and Wesselius, P. (1984), Discovery of a shell around Alpha Lyrae. Astrophys. Jour. , 278, L23-L27. Bailey. , Clube, S. , and Napier, WM. (1990), The Origin of Comets (Pergamon Press, Oxford) p. 452. Barak, I. and Bar-Nun, A. (1975), The mechanism of amino acid synthesis by high temperature shock waves. Origins Life 6, 483-506. , and Sagan C. (1970), Shock synthesis of amino acids in simulated primitive environments. Science, 168,470-473. , and Or6, 1. (1981), Could life have originated in cometary nuclei?

Origins Life, 19, 87-93. , and Vidal-Majdar, A. (1987), The Beta Pictoris circumstellar disk IV. Redshifted UV lines. Astron. , 173, 289-292. , and Ferlet, R. (1988), The {3 Pictoris circumstellar disk VI. Evidence for material falling on to the star. Astron. , 190, 275-282. , and Chassefiere, E. (1987), First statistical analysis of 5000 mass spectra of cometary grains obtained by PUMA (Vega 1) and PIA (Giotto) impact ionization mass spectrometers in the compressed modes. Astron. , 187,761-766.

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