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Дата изменения: Tue May 18 17:48:07 2004
Дата индексирования: Tue Oct 2 05:00:45 2012
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Interstellar Panspermia

Bill Napier has discovered a probable mechanism for interstellar panspermia, based on the earlier result by Melosh and others that fecund, metre-sized boulders will be ejected from Earth into interplanetary space by large impacts. In the presence of a dense zodiacal cloud (e.g. due to the break-up and decay of a large comet), these boulders are very rapidly eroded to beta-meteoroids which are then ejected from the solar system by solar radiation pressure, surrounding the solar system with an expanding 'biodisc'. During passages of the solar system through cold molecular clouds, these life-bearing meteoroids may be incorporated into new protoplanetary systems. The time-scales for all these processes are comfortably less than those for destruction of micro-organisms by cosmic rays. The work, which was published in 2004, attracted a significant amount of attention from the press, including a note in Nature Science Update and a CBC radio interview.