Transportation of Life between Worlds:

Discussion in 'Astronomy, Exobiology, & Cosmology' started by paddoboy, Nov 20, 2017.

  1. paddoboy Valued Senior Member

    Messages:
    21,647
    https://phys.org/news/2017-11-space-life-worlds.html

    Space dust may transport life between worlds

    Life on our planet might have originated from biological particles brought to Earth in streams of space dust, a study suggests.

    Read more at: https://phys.org/news/2017-11-space-life-worlds.html#jCp

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    the paper:
    https://arxiv.org/pdf/1711.01895.pdf

    Space dust collisions as a planetary escape mechanism:

    It is observed that hypervelocity space dust, which is continuously bombarding the Earth, creates immense momentum flows in the atmosphere. Some of this fast space dust inevitably will interact with the atmospheric system, transferring energy and moving particles around, with various possible consequences. This paper examines, with supporting estimates, the possibility that through collisions, the Earth-grazing component of space dust can facilitate planetary escape of atmospheric particles, whether they be the atoms and molecules forming the atmosphere or bigger sized particles. As one interesting outcome, floating in the Earth’s atmosphere are a variety of particles containing the telltale signs of Earth’s organic story, including microbial life and life essential molecules. This paper will assess the ability for this space dust collision mechanism to propel some of these biological constituents into space.
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    Panspermia is a favourite scenario of mine, and while this article and paper still do not really offer concrete evidence that it did take place, it certainly does leave that possibility still open for discussion. And of course whether Life started on Earth or was transported here, or vice versa, it still does not detail how life first arose in the universe or any evidence as to how obviously Abiogenesis first took place.
     
    sculptor likes this.
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  3. orcot Valued Senior Member

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    it could be possible. Certainly if we ever find life outside of earth it should be checked if it's true alien life or yust a stow away from earth. Whilst life could have come here from outer space. At this point in time earth is probably the biggest contributor to sending life into space... (and who knows what they will find in those geysers spewing water and who knows what, into space near Enceladus or other
     
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