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Astrobiología: Del Big Bang a las Civilizaciones - SPIN - Unesco

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144 Julio Ángel Fernández<br />

7. Ejercicios<br />

¿De qué forma la presencia de una población de cometas y otros<br />

objetos ricos en hielos puede afectar la discusión del concepto de<br />

“zona habitable” alrededor de un sistema planetario?<br />

¿Qué requisitos deberían cumplirse para que otras estrel<strong>las</strong> estuvieran<br />

rodeadas de nubes de cometas orbitando a grandes distancias<br />

formando una estructura del tipo de nube de Oort?<br />

Referencias<br />

Bailey, M.E., Clube, S.V.M. y Napier, W. M. The Origin of Comets, Oxford, England,<br />

Pergamon, 1990.<br />

Beckwith, S.V.W. y Sargent, A.I. The occurrence and properties of disks around young stars<br />

en Protostars and Planets III, E.H. Levy y J.I. Lunine, eds., Tucson, Univ. Arizona<br />

Press, pp. 521-542, 1993.<br />

Blitz, L. Giant molecular clouds en Protostars and Planets III, E.H. Levy y J.I. Lunine, eds.,<br />

Tucson, Univ. Arizona Press, pp. 125-162, 1993.<br />

Brunini, A. y Fernández ,J.A. Numerical simulations of the accretion of Uranus and Neptune,<br />

Planetary and Space Science, vol. 47: 591-605, 1999.<br />

Chang, S. Comets: Cosmic connections with carbonaceous meteorites, interstellar molecules<br />

and the origin of life en Space Missions to Comets, M. Neugebauer, D.K. Yeomans, J.C.<br />

Brandt y R.W. Hobbs, eds., Washington, DC., NASA CP 2089, pp. 59-111, 1979.<br />

Chyba, C. F. The cometary contribution to the oceans of the primitive Earth, Nature, vol. 330:<br />

632-635, 1987.<br />

Chyba, C. F., Thomas, P. J., Brookshaw, L. y Sagan, C. Cometary delivery of organic<br />

molecules to the early Earth, Science, vol. 249: 366-373, 1990.<br />

<strong>Del</strong>semme, A. H. The cometary connection with periodic chemistry, Origins Life, vol. 14: 51-<br />

60, 1984.<br />

<strong>Del</strong>semme, A. H. Nature and history of the organic componds in comets: An astrophysical view<br />

en Comets in the Post-Halley Era, R.L. Newburn Jr., M. Neugebauer y J. Rahe, eds.,<br />

Dordrecht, Kluwer, pp. 377-427, 1991.<br />

<strong>Del</strong>semme, A. H. The deuterium enrichment observed in recent comets is consistent with the<br />

cometary origin of seawater, Planetary and Space Science, vol 47: 125-131, 1999.<br />

Edgeworth, K. E. The origin and evolution of the solar system, Monthly Notices of the Royal<br />

Astronomical Society, vol. 109: 600-609, 1949.<br />

Fernández, J. A. On the existence of a comet belt beyond Neptune, Monthly Notices of the<br />

Royal Astronomical Society, vol. 192: 481-491, 1980.<br />

Fernández, J. A. Comets. Nature, Dynamics, Origin, and their Cosmogonical Relevance,<br />

<br />

Fernández, J. A. y Ip, W. H.<br />

impact process of the terrestrial planets en Astronomical and Biochemical Origins and

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