[ExI] Life must be everywhere!
rtomek at ceti.pl
Sat Apr 14 16:49:20 UTC 2012
On Sat, 14 Apr 2012, Tomasz Rola wrote:
> I was thinking of the other end of this "pan-sperm adventures", i.e.
> landing on a remote body. Escape velocity for Solar System is 525 km/s.
> This is how fast - at a minimum - an ejecta will have to go to make it
> One can play with impact effect calculator, here:
> to see how hard (or maybe easy) actually it is going to be for any life to
> survive an impact with Earth-like planet. I assume if I could got burned
> alive standing at 100 km distance from impact of 1km-radius iron body
> running at 525 kmps, the effect is like quite a big nuclear weapon blast.
> How much life survived at test epicenters? Without looking for data, I
> guesstimate everything close to impact will get sterilized.
It is no better with smaller objects, which evaporate during atmospheric
entry. Again, I assume temperature alone is enough to get rid of a life
problem. Deceleration is going to improve this, I think.
Add to this millions of years it takes to get somewhere inside 20ly
radius. All those years ejecta is subject to all kind of radiation - full
spectra, actually, including possibility of supernova during such a long
** A C programmer asked whether computer had Buddha's nature. **
** As the answer, master did "rm -rif" on the programmer's home **
** directory. And then the C programmer became enlightened... **
** Tomasz Rola mailto:tomasz_rola at bigfoot.com **
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