Path: ...!weretis.net!feeder8.news.weretis.net!reader5.news.weretis.net!news.solani.org!.POSTED!not-for-mail From: Jan Panteltje Newsgroups: sci.electronics.design Subject: Re: Shielding spacecraft against cosmic radiation Date: Fri, 15 Mar 2024 07:28:39 GMT Message-ID: References: <34h1vihp32geb2olkcscfksbr8k0bdgdmu@4ax.com> MIME-Version: 1.0 Content-Type: text/plain; ISO-8859-15 Content-Transfer-Encoding: 8bit Injection-Date: Fri, 15 Mar 2024 07:28:39 -0000 (UTC) Injection-Info: solani.org; logging-data="1457834"; mail-complaints-to="abuse@news.solani.org" User-Agent: NewsFleX-1.5.7.5 (Linux-5.15.32-v7l+) Cancel-Lock: sha1:NHI5OoS3ex74tgKiFBaju1nv7/Q= X-User-ID: eJwFwQkBwDAIA0BLpYFA5YzPv4TdGSgsVxrV1nbtC8fk7u2pab854u9lloqrvzjR2MbrbHYpSwgBsuIU5geBUxZi X-Newsreader-location: NewsFleX-1.5.7.5 (c) 'LIGHTSPEED' off line news reader for the Linux platform NewsFleX homepage: http://www.panteltje.nl/panteltje/newsflex/ and ftp download ftp://sunsite.unc.edu/pub/linux/system/news/readers/ Bytes: 5253 Lines: 91 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 :-)