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Thread: Exporting Life with Objects like Borisov, Oumuamua

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    Exporting Life with Objects like Borisov, Oumuamua

    Amir Siraj and Abraham Loeb, never lacking imagination, suppose the liklihood of a passing rock or comet picking up life from Earth and transporting it Panspermia style throughout the galaxy. It increases dramatically if life is found above 80 km above the Earth's surface. But, when he concludes "we've never detected life above that height,".. that's incorrect. The International Space Station most definitely has life above that height, and should it suffer an untimely demise at the hands of a visiting Interstellar Comet (Borisov) or Rock (Oumuamua)...traces of life would be transported to the far reaches of the galaxy.
    SEE:https://arxiv.org/abs/1910.06414


    pete
    Last edited by trinitree88; 2019-Oct-16 at 07:39 PM. Reason: typos

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    Quote Originally Posted by trinitree88 View Post
    The International Space Station most definitely has life above that height, and should it suffer an untimely demise at the hands of a visiting Interstellar Comet (Borisov) or Rock (Oumuamua)...traces of life would be transported to the far reaches of the galaxy.
    At orbital speeds, a collision may in fact sterilize any life aboard.
    "I'm planning to live forever. So far, that's working perfectly." Steven Wright

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    Quote Originally Posted by Noclevername View Post
    At orbital speeds, a collision may in fact sterilize any life aboard.
    Yep. I've done the calculation for the Barringer crater....cold iron meteorite, warm it up to the melting point, heat of fusion, heat the liquid to boiling iron, heat of vaporization, heat the vapor, ionization energy of the neutral atoms...etc..and there's sufficient kinetic energy for a fireball result. No argument. That would be sterile. The intriguing part is the Allan Hills meteorite from Mars.
    Known to be Martian. Made it to Earth. Has those as yet unconfirmed electron microscopic chains in it. As of now, still only possible fossils. So, panspermia remains in the realm of maybe. They have shown exospores to tolerate brief heating to about 700 degrees, and it would require a glancing blow...to pull it off. Agreed not likely, but that's different than impossible.
    pete

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    The difficult part of panspermia isn't getting life into space, it is preserving it long enough to allow a transfer from one planet to another, or one star to another. Any living organism that was carried away on an interstellar comet might wait millions or billions of years before the comet reaches a suitable planet; after that length of time it is unlikely that anything living could survive.
    Last edited by eburacum45; Yesterday at 04:13 PM.

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    Quote Originally Posted by eburacum45 View Post
    The difficult part of panspermia isn't getting life into space, it is preserving it long enough to allow a transfer from one planet to another, or one star to another. Any living organism that was carried away on an interstellar comet might wait millions or billions of years before the comer reaches a suitable planet; after that length of time it is unlikely that anything living could survive.
    And the vast luck of hitting a "suitable" planet for long term survival and reproduction at all.
    "I'm planning to live forever. So far, that's working perfectly." Steven Wright

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