Path: Xl.tags.giganews.com!local-2.nntp.ord.giganews.com!nntp.supernews.com!news.supernews.com.POSTED!not-for-mail NNTP-Posting-Date: Fri, 15 Mar 2024 09:36:56 +0000 From: John Larkin Newsgroups: sci.electronics.design Subject: Re: Shielding spacecraft against cosmic radiation Date: Fri, 15 Mar 2024 02:35:27 -0700 Organization: Highland Tech Reply-To: xx@yy.com Message-ID: References: <34h1vihp32geb2olkcscfksbr8k0bdgdmu@4ax.com> X-Newsreader: Forte Agent 3.1/32.783 MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Lines: 104 X-Trace: sv3-jC0eMBnQ6Miqr3jdAcCK5v3Sf3FycI7Ovpb8QS2aXc5MeKDmfCkevyWYrEUhFcaYYA7fQq9D+vWyP/9!lgAOl/4zCKxeEx4wei1lg7JHx/VMhcYEiJVO+ZxPWcCiK+zbyNaYCZp76kXMPxZiWL1pY8Ryd+JO!abOU+Q== X-Complaints-To: www.supernews.com/docs/abuse.html X-DMCA-Complaints-To: www.supernews.com/docs/dmca.html X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly X-Postfilter: 1.3.40 Bytes: 5686 On Fri, 15 Mar 2024 07:28:39 GMT, Jan Panteltje wrote: >On a sunny day (Thu, 14 Mar 2024 10:38:47 -0700) it happened john larkin > wrote in : > >>On Thu, 14 Mar 2024 16:46:07 GMT, Jan Panteltje >>wrote: >> >>>On a sunny day (Thu, 14 Mar 2024 08:13:31 -0700) it happened John Larkin >>> wrote in : >>> >>>>On Thu, 14 Mar 2024 06:13:43 GMT, Jan Panteltje >>>>wrote: >>>> >>>>>On a sunny day (Wed, 13 Mar 2024 03:54:24 -0700) it happened John Larkin >>>>> wrote in : >>>>> >>>>>>On Wed, 13 Mar 2024 07:09:47 GMT, Jan Panteltje >>>>>>wrote: >>>>>> >>>>>>>On a sunny day (Tue, 12 Mar 2024 14:18:18 -0700) it happened john larkin >>>>>>> wrote in <34h1vihp32geb2olkcscfksbr8k0bdgdmu@4ax.com>: >>>>>>> >>>>>>>>On Tue, 12 Mar 2024 06:22:55 GMT, Jan Panteltje >>>>>>>>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.