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From: John Larkin <jl@997PotHill.com>
Newsgroups: sci.electronics.design
Subject: Re: Shielding spacecraft against cosmic radiation
Date: Fri, 15 Mar 2024 02:35:27 -0700
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On Fri, 15 Mar 2024 07:28:39 GMT, Jan Panteltje <alien@comet.invalid>
wrote:

>On a sunny day (Thu, 14 Mar 2024 10:38:47 -0700) it happened john larkin
><jl@650pot.com> wrote in <s3d6vi95gfrbs6omoula55soaktalpggru@4ax.com>:
>
>>On Thu, 14 Mar 2024 16:46:07 GMT, Jan Panteltje <alien@comet.invalid>
>>wrote:
>>
>>>On a sunny day (Thu, 14 Mar 2024 08:13:31 -0700) it happened John Larkin
>>><jl@997PotHill.com> wrote in <in46vipa7a3eb6q7au6alobve5vfmv5jso@4ax.com>:
>>>
>>>>On Thu, 14 Mar 2024 06:13:43 GMT, Jan Panteltje <alien@comet.invalid>
>>>>wrote:
>>>>
>>>>>On a sunny day (Wed, 13 Mar 2024 03:54:24 -0700) it happened John Larkin
>>>>><jl@997PotHill.com> wrote in <ae13viptr1sskaqq1h2ru1j9i85sdecfrd@4ax.com>:
>>>>>
>>>>>>On Wed, 13 Mar 2024 07:09:47 GMT, Jan Panteltje <alien@comet.invalid>
>>>>>>wrote:
>>>>>>
>>>>>>>On a sunny day (Tue, 12 Mar 2024 14:18:18 -0700) it happened john larkin
>>>>>>><jl@650pot.com> wrote in <34h1vihp32geb2olkcscfksbr8k0bdgdmu@4ax.com>:
>>>>>>>
>>>>>>>>On Tue, 12 Mar 2024 06:22:55 GMT, Jan Panteltje <alien@comet.invalid>
>>>>>>>>wrote:
>>>>>>>>
>>>>>>>>>Shields up: New ideas might make active shielding viable
>>>>>>>>>Active shielding was first proposed in the '60s. We’re finally close to making it work.
>>>>>>>>> https://arstechnica.com/science/2024/03/shields-up-new-ideas-might-make-active-shielding-viable/
>>>>>>>>>
>>>>>>>>>bit of static oelectricity, 1 MV ?
>>>>>>>>
>>>>>>>>That's all absurd, cramming a crew into a tiny dark cylinder, deep
>>>>>>>>inside tons of magnets, to reduce their radiation exposure a little.
>>>>>>>
>>>>>>>Yes that may be more dangerus, tha tI why I like the elctrostatic solution.
>>>>>>>
>>>>>>>
>>>>>>>>Space is not people-friendly. Earth is.
>>>>>>>>
>>>>>>>>Traveling to or living on Mars woud be lethal. Living on the moon
>>>>>>>>would be bad too.
>>>>>>>
>>>>>>>Maybe we could convert some comet, live inside it,
>>>>>>>use its material for power water and  shelter
>>>>>>>and put an engine on it and start interstellar travel:
>>>>>>> https://en.wikipedia.org/wiki/%CA%BBOumuamua
>>>>>>
>>>>>>You go first.
>>>>>
>>>>>Oh I would not mind flying the comet thing, would want to have a say in the design and food chosen though.
>>>>>but it will take generations to reach any target destination.
>>>>>So you have to bring whole families ,
>>>>>or as things go now, just some skin and have a computah hatch you
>>>>>and teach you when growing up near the destination.
>>>>>Makes you wonder if the first life on earth was brought here in a similar way 
>>>>>(circular reasoning).
>>>>
>>>>Earth is too good to be an accident, and our life form is too complex
>>>>to have evolved from inorganics. Other civiizations in the universe
>>>>have probably advanced for billions of years. So it's likely that
>>>>Earth and DNA-based life were designed, maybe as a high school science
>>>>project. I give it a B-.
>>>
>>>Well I won't attack your religious beliefs
>>
>>I expressed no religious beliefs, and it's good that you wouldn't
>>attack any.
>>
>>RNA World is a religious belief. Concensus and faith without evidence.
>>
>>
>>>Just watched some news story where a sort of computer robot was teaching kids...
>>>Again, an other science program today on TV about planets: all sort of basic chemistry was found
>>>on some moons and asteroids.
>>
>>Sure. Chemicals are not life, as a junk box full of parts is not a
>>working electronic instrument.
>>
>>
>>>They did a testing in the lab and made RNA from just basic chemicals added some heat cycling and dry soak cycle
>>>like you will find on planets (sun, tides):
>>> https://phys.org/news/2022-03-insight-life.html
>>>
>>>we are just a chemical reaction really.
>>>
>>
>>We are an astoundingly complex structure that uses chemicals and
>>quantum mechanics. At least I am.
>
>from elementary particles to atoms to molecules to self-replicating RNA (check)
>from RNA to DNA and ever more complex forms like us (check)
>Readup on Darwin
>:-)

Read up on the ways our cells operate and reproduce. It's astounding.

Darwin was very smart, but he had no idea how cells work. I think that
if he had, he'd have been skeptical of random evolution and selection
as our origin.