Path: ...!news.mixmin.net!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Don Y Newsgroups: sci.electronics.design Subject: Re: Expedition to Europa Date: Sat, 29 Jun 2024 14:20:11 -0700 Organization: A noiseless patient Spider Lines: 65 Message-ID: References: <63br7jpf7le468rnljlfhaol4432dt70lq@4ax.com> <667f96cb$0$2873004$882e4bbb@reader.netnews.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Injection-Date: Sat, 29 Jun 2024 23:20:25 +0200 (CEST) Injection-Info: dont-email.me; posting-host="2c0b654a66bceec8b8c072ac20cb2fd5"; logging-data="119897"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX19IpSxCQiSB6HEeptf1Ja0c" User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:102.0) Gecko/20100101 Thunderbird/102.2.2 Cancel-Lock: sha1:eHLbFeWg1n6ur4CmEVnUOr9oryk= In-Reply-To: Content-Language: en-US Bytes: 4220 On 6/29/2024 11:25 AM, Jeroen Belleman wrote: > On 6/29/24 19:11, Don Y wrote: >> On 6/29/2024 8:35 AM, Joe Gwinn wrote: >>> On Sat, 29 Jun 2024 04:04:11 -0700, Don Y >>> wrote: >>> >>>> On 6/28/2024 10:08 PM, bitrex wrote: >>>>> On 6/27/2024 5:17 PM, Don Y wrote: >>>>> >>>>>>> Most big librarys carry AW. >>>>>>> >>>>>>> . >>>>>>> >>>>>>> If it turns out that there is life in the ocean of Europa, which has >>>>>>> existed for something like four billion years, it supports the general >>>>>>> idea of "random but inevitable" theories of Abiogenesis. >>>>>> >>>>>> _Remembrance of Earth's Past_ has an interesting take on the whole >>>>>> notion behind an "empty" universe.  It's a tedious read (mainly for >>>>>> me coming from a non-chinese culture... just keeping track of the >>>>>> characters is difficult) but has some good ideas to chew on at its core. >>>>> >>>>> My guess: The Universe is mammoth, the technological and energy >>>>> requirements of >>>>> even short-distance interstellar travel are immense, the lifespan of >>>>> technological civilizations is highly time-limited before such a civilization >>>>> destroys itself, technological civilizations are very rare to begin with, and >>>>> no technological civilization ever survives long enough to attempt it. >>>> >>>> That wouldn't explain why there are no *signs* of intelligent life. >>>> >>>> *We* can't (yet) travel interstellar distances in single lifetimes >>>> but I'm sure anyone with technology comparable to ours would be able to >>>> *detect* our presence (given that we seem to make no attempt at "hiding") >>>> >>>> _If the Universe Is Teeming with Aliens ... WHERE IS EVERYBODY?_ gives some >>>> interesting takes on the Fermi paradox. >>> >>> That's a bit self-important. >>> >>> If the universe is teaming with life, but alien civilizations capable >>> of interstellar travel are exceedingly rare, there would be little >>> reason for those spacefaring aliens to visit any but the other >>> advanced alien civilizations. >>> >>> We might get the equivalent of an anthropologist ever few million >>> year, and they would do whatever needed to prevent detection by that >>> which they study. >> >> Why does an alien race have to VISIT in order to EXIST? >> >> *We* can't visit anything beyond lunar orbit (perhaps Mars, soon) >> yet we expend considerable effort "looking". >> >> What techniques have our deep space probes used /to prevent detection/? > > I think we aren't nearly as conspicuous as you think we are. The > deep space probes are tiny. There is not the slightest chance of > finding them without knowing exactly where to look. The very > presence of earth itself is barely noticeable beyond a few > lightyears. Yet *we* look. Do we imagine other life forms will be MORE conspicuous?