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Is there life in the Universe
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 Is there life in the UniverseJWST, has upped the estimation of how many galaxies are in our observable universe from 2 Trillion to 6-20 Trillion estimate. Question , Is there life in the Universe? please give reasons for your answers if you decide to participate. |
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yes |
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i forgot |
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If only one star in a trillion had a planet with life on it. The low end number would be 200 Billion. |
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youtube.com |
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Life I think it is meaningless to talk about life in other galaxies. And the further back in time they are, the less likely life is. So all those red dot galaxies—no life. That was the first 1.5 billion years. There could easily be life there in the now now, but not in the seeable (perceivable) now. So that limits life to our ten billion light year bubble of galaxies. Still a vast, vast number. And again, other galaxies? Pointless. While BC believes we’ll break c we’ve no reason to view natural law as mutable. Antigravity is fun to contemplate but no more possible than perpetual motion. TANSTAAFL. So our galaxy. Where are they, the Fermi paradox people? We have three hundred billion suns, give or take a hundred billion. Let’s jettison the central bulge stars as too rich in energetic radiation, and the rim stars as paucit in heavy metals. Life is chemistry, baby. I thought central bulge and metal poor would constitute billions of stars, but it turns out there are mere millions (or even only hundreds of thousands) in these categories. The bulk of stars are binary, trinary, kempler rosettes (very rare), etc. only 15% are solitary, like our sun. Solitary stars might be recent cluster rejects, unstable stars, lack decent planetary retinues, or what have you. So to be conservative (and to simplify the math) let’s just say ten percent of 200 billion. So 20 billion candidate stars. Most will be sol sized or smaller. The big ones are rare, and have lifetimes too short for suitable evolution. The next number is really hard to know. Thirty years ago we had zero idea. Now we have a much tighter handle on it. The oracle says 94% of stars sport worlds. We will round that up to 100%, since we already rounded solitary stars down, and I regard it as likely we just haven’t seen those six percent planets. A star might have multiple habitable worlds, or none at all. That number is really hard. We have found nearly 6000 exoplanets. We think 70 of those may be habitable. Let’s round down to 60, to be conservative and simplify the math. That gives us 1%. 1% of 20 billion is 200 million, which is in close congruence with the AI estimate of 300 million. I like my number better. |
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If a species isn't intelligent and wise enough to stop shiting where they eat. They get the boot. |
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The Meaning of Life Part II—The Third World “God has blessed us so much I cannot afford to feed you. So my mind’s made up, and its medical experiments for the lot of you.” “Couldn’t you accidentally get your balls cut off?” “God would see through such a cheap trick as that, Nigel. Remember, what we do to ourselves, we do to him.” So life started so early on earth most biologists feel that given suitable conditions it is nearly inevitable, while acknowledging even our simplest organisms remain mind bogglingly complex. So this is our hardest number yet. Are we alone, or is the percent closer to 100? Let’s go with inevitable. So they all sport life. We’re already well under the AI habitability estimate, we can afford to be liberal. The next step is way more difficult yet. So given Earth as our sole sample, we have half a billion years of metazoans out of 4 billion years of protozoans. That is one in eight worlds sporting multicellular life. That is 12.5%. 25 million multicellular worlds. Now we do intelligent life. Twenty five million species on Earth (or probably more), and only one capable of making fire (currently). So we might well be it in the Milky Way, as far as fire tech goes. |
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Short Spurt So all our tech will change from being devoted to exploring subatomic and outer space to mere survival. Sadly, the free market solution to climate change we settled on fifty years ago was to simply lie about the problem and ignore it, and to that end we elected a blithering idiot eager to wage all out war upon our environment in order to own the damned libs, MAGA. So our future is a Mad Max style world we’re building with salivating anticipation. Mel Gibson is definitely proud, our new ambassador to Hollywood. |
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Question:- "Is there life in the Universe?" Answer :- Yes. Only this morning I saw several examples here on Earth. Now to answer the question that was intended :- "Has life happened in the Universe OTHER THAN on Earth?" Answer :- We have no proof, but the laws of Chemistry combined with data from Astronomy would suggest that life will arise reasonably promptly (geologically speaking) whenever the conditions are suitable. Objections :- The most significant objection to the expectation that life is (relatively) common is the Fermi Paradox. Objection answered #1 :- At first sight this would suggest that life capable of interstellar or even interplanetary travel is rare; but that only applies to a form of life that is extremely rare even here on Earth, existing for only one millionth of one percent of the time there has been life on Earth. Even now, we are still barely capable of interplanetary travel, and interstellar travel is only possible by our machines travelling at well under 0.1% of lightspeed. Objection answered #2 :- British author Stephen Baxter en.wikipedia.org has written some brilliant sci-fi in the 'Manifold Trilogy' and other short stories in which he explores a wide range of possible answers to the Fermi Paradox. Objection answered #3 :- Don't worry; they'll be here soon enough! As soon as our broadcasts of 'I Love Lucy' (spreading out from Earth at lightspeed) reach them they'll be on their way here to exterminate us, for the mental health of all sentient species in the galaxy. As they get nearer they'll pick up more recent broadcasts, specially our news transmissions, which will only stiffen their resolve. |
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Sublight Speed |
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Shiva 01:14 |
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bobspringett |
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Lord Shiva 01:14 |
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IMHO, our best hope is finding signatures in the spectra of exoplanets. Looking for specific signatures. AI will be of great use along with quantum computing. We could search vast stretches of information relatively quickly. But that is still decades away. If we make it. |
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The Fermi Paradox |
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bobspringett |
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"Why haven't they found us?"... |
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The Fermi Paradox addresses both why we have not found evidence of extraterrestrial life and why extraterrestrials have not found or contacted us, despite the high probability of intelligent life existing elsewhere in the universe. However I have often said I. Regards to them making first contact. It would be like you and I going to the Zoo. When we get to the sliver back gorilla enclosure I turn to you and say.... Go in and make first contact. But in all seriousness. Any civilization that is that far advanced. Probably wouldn't want to shake our ant nests if they don't have to. |
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Patz 13:34 & 13:37 I'm just clarifying what the Fermi Paradox asks. If your answer is 'They have found us, but we haven't noticed yet', then that's fine by me. It seems to be Voci's answer too, judging by his 13:36 post. Or if it's 'Any civilization that is that far advanced probably wouldn't want to shake our ant nests', that's fine too. 13:37 <When we get to the sliver back gorilla enclosure I turn to you and say.... Go in and make first contact.> Which is what Diane Fossey did, and the gorillas were totally aware of her presence. My preference (and ONLY a preference, ready to change as more evidence becomes available) is that life capable if interstellar flight is incredibly rare, or perhaps non-existent. Our own observations on Earth show that intelligence is a high metabolic demand function, so animals tend to develop only so much intelligence as is useful. Once a species has put an end to any serious threats to it, why waste energy being more intelligent than needed to survive? We see that in Neanderthals, whose environment allowed only small clans so each individual had to be capable of many different tasks, while Sapiens could form larger groups and specialise; the result is that Sapiens brains are smaller than Neanderthals. So "Why are they not here?" Because they don't need to be, to survive. They're still back on their home planets, probably as hunter-gatherers and doing quite well thank you, just like Homo was for a couple of million years until changing climate put a premium on being able to work out a new survival technique once every hundred generations or so. |
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‘‘Unidentified Anomalous Phenomena Records Collection"... www.archives.gov |
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History of UFOs In the twentieth century, there were many sightings of machines flying across the sky, but not many reports of dragons. When people see something unexpected or unusual, the mind interprets it into categories they already understand. The Ascension of Jesus is probably one such event. Whatever the disciples actually saw, they interpreted it into what they in their culture could understand. It leaves open the question of 'How far up do you have to go to get to Heaven?' So 'Unidentified Anomalous Phenomena' is probably no more and no less than accurate. Whatever was seen, it was unidentified. Asking 'What else could it be?' is meaningless; it implies that Reality is limited to what we already know. |
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What Fraction of the Galaxy Knows We’re Here? Why haven’t we heard? Damn. Most of that tiny volume hasn’t had time for their return signal yet. What are you all thinking? |
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jonheck 24-Jan-25, 01:32 |
lord_shiva There is always room to hope that we may some day hear from them, but ya gotta put electricity on the shelf to make it routine. Just one knowledge step that moved us beyond the speed limits imposed by the EMS and we could be on a roll. What do the numbers look like if communication speeds were at warp nine? “Hi Spock, it’s really great to hear from ya big guy. Peace and prosper”. |
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The Cosmos is humming with life |
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jonheck 24-Jan-25, 08:16 |
Brigadecommander |
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