Re: life test for planets

From: jeff davis (
Date: Mon Jan 28 2002 - 15:16:10 MST

--- Amara Graps <> wrote:
Eugene Leitl <>, Sun,
27 Jan 2002 made the following comment:
> >No, just our solar system. There is vigorous
> (albeit
> >assymetrical) material exchange within the inner
> solar system through
> >impact ejecta, there's zero interstellar pebble
> capture, however. Dust is
> >too small, and travels too long to be fried
> thoroughly. Hence, stellar
> >systems are probably mutually isolated petri
> dishes.

and Amara, providing a substantial bibliography (I
love abstracts; the way they distill the essence of
the longer, formal, detail-burdened knowledge
missive.) replied:

> 'We' are not isolated bubbles. Other nearby stars
> are not isolated
> from 'Us', either.
> Did I misunderstand your above statement, Eugene?
> Amara

It's possible that Gene missed the
panspermia-supportive/suggestive discovery/event last
publicized in verschiedene media, cf

My questions:

1. What other transport substrates could there be
other than salt, with what durability characteristics?

2. How challenging to the life seed's survival are the
"launch" conditions of the (super)nova blast?

3. Particle sizes to encapsulate the life seed vary
from just larger than the seed, to ?; how might this
vary by ablation or accretion in transit?; what degree
of protection does this afford the life seed re
exposure to destructive radiation during the long
intersteller transit?; and what is the intensity of
that radiation?

4. How do the various factors affect survivabilty in
regards the fiery challenges of rentry?

One single viable microbe is all it takes.

Best, Jeff Davis

   "My guess is that people don't yet realize how
          "handy" indefinite lifespan will be."
                            J Corbally


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