The purpose of your life and the origin of our universe. - Page 1
Forum section: electronics / general

author: bjdhjy888
author_rank: Regular Contributor
timestamp: January 28, 2020, 11:14:15 pm
content: There are billions of earth-sized planets in our milky way.There are billions of milky way-sized galaxies in our known universe.Ain't this mind-blowing?We're like ants in a giant hall, working to survive, while suffering from illness, wars, etc sh!t...man, this is sad.

author: Mr.B
author_rank: Unknown
timestamp: January 28, 2020, 11:18:24 pm
content: Oh dear...This thread can only spiral down hill quickly.

author: Brumby
author_rank: Unknown
timestamp: January 28, 2020, 11:20:09 pm
content: Quote from: bjdhjy888 on January 28, 2020, 11:14:15 pmIt is ... plus beautiful, inspiring, fascinating and ours to embrace.QuoteMy friend ... the glass is not half empty - it is half full. Look at filling it (and your life) with more. Don't sit back and wait for it to evaporate.

author: Electro Detective
author_rank: Super Contributor
timestamp: January 29, 2020, 12:11:51 am
content: People looking above and beyond, thinking too deep about it, are wasting good thought time on Earthand missing or not appreciating fully what's around them here and nowIt's a short time down here for everyone, and we have enough BS taught and flogged daily to digestwithout having to think about what may or may not be going on 'out there'or wasting resources getting there.I'll bet some dude on the other side 'out there' is posting the same thing on their version of the EEVblog forum,and copping this same reply/repliesas well as people in our local past looking up at the stars, wondering..with the result a few dishonest enterprising asses made a big deal out of it, knocked up some believable sounding fairy tales to control masses of simpletons over the centuries,and made a LOT of gold, silver, cash, and digital wealth from it, promoting LOTS of trouble like war and famine to keep business pumpingrackets which their offspring inherited and still run today as legit easy money 'operations'This is why extra terrestrial aliens don't hang out here, and never will, because they can't fathom the insanity of it all,and planted'FOREVER No Go Zone, WRONG WAY GO BACK!!!'signs and communications beacons in space for others to avoid.Stuff them anyway, be happy with what we have,and not have to deal with 'advanced' smartass aliens, who fly around the universe like bored cashed up tourists,most likely because they don't appreciate their own home turf,and or looking for some cheap resources to rip off the defenceless humans,or beam up a few and take some back for 'probing'

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: January 29, 2020, 12:18:30 am
content: Quote from: Mr.B on January 28, 2020, 11:18:24 pmHi everybody.

author: AlfBaz
author_rank: Super Contributor
timestamp: January 29, 2020, 12:25:27 am
content: Feeling insignificant is something you get used to as you get older

author: IanB
author_rank: Super Contributor
timestamp: January 29, 2020, 12:33:35 am
content: Ticking away the moments that make up a dull dayFritter and waste the hours in an offhand way.Kicking around on a piece of ground in your home townWaiting for someone or something to show you the way.Tired of lying in the sunshine, staying home to watch the rain.You are young and life is long and there is time to kill today.And then one day you find ten years have got behind you.No one told you when to run, you missed the starting gun.So you run and you run to catch up with the sun but it's sinkingRacing around to come up behind you again.The sun is the same in a relative way but you're older,Shorter of breath and one day closer to death.

author: free_electron
author_rank: Super Contributor
timestamp: January 29, 2020, 01:43:36 am
content: I can't get to sleepI think about the implicationsOf diving in too deepAnd possibly the complicationsEspecially at nightI worry over situationsI know will be alrightPerhaps it's just imaginationDay after day it reappearsNight after night my heartbeat shows the fearGhosts appear and fade awayAlone between the sheetsOnly brings exasperationIt's time to walk the streetsSmell the desperationAt least there's pretty lights ... ( see first picture )

author: SilverSolder
author_rank: Super Contributor
timestamp: January 29, 2020, 03:52:35 am
content: Love is the answer.(What was the question again?)

author: BravoV
author_rank: Super Contributor
timestamp: January 29, 2020, 04:13:27 am
content: At the end, its all about low temperature chemical reactions at the surface on earth, and will stop once it reached equilibrium if there is no space colonization, or just wait till the sun goes bang/expand and roast everything.Like a really faint blip in pico or femto seconds at universe's clock.

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: January 29, 2020, 04:22:33 am
content: Quote from: SilverSolder on January 29, 2020, 03:52:35 amI thought the answer was 42.

author: Nominal Animal
author_rank: Super Contributor
timestamp: January 29, 2020, 06:03:57 am
content: What would you do if you thought you had found some answers, but could only express them as pseudo-spiritual waffling?Some answers are such that before you find them yourself, they sound like inane crap and make no sense.Keep looking.

author: blacksheeplogic
author_rank: Frequent Contributor
timestamp: January 29, 2020, 06:13:44 am
content: I'm here to collect calculators.

author: Homer J Simpson
author_rank: Super Contributor
timestamp: January 29, 2020, 06:15:07 am
content: An AvE perspective

author: daqq
author_rank: Super Contributor
timestamp: January 29, 2020, 07:03:49 am
content: QuoteYes, that is part of it. We are also enjoying life occasionally, doing something nice.QuoteHere, try this:Might make you happier, might make you more sad.I like to think of things this way:On a cosmic scale we do not matter. There is no grand reference point which judges worthiness or 'mattering'. All worth and mattering is relative to the observer. If nothing matters than anything can matter.If you enjoy growing potatoes, or collecting and restoring vintage calculators, or creating the perfect 10.000000V reference, then don't worry about the fact that it doesn't matter from a cosmic point of view. It matters to you and it makes you happier. Do it, try it.

author: SilverSolder
author_rank: Super Contributor
timestamp: January 29, 2020, 04:25:03 pm
content: Quote from: daqq on January 29, 2020, 07:03:49 amBut it does matter from a cosmic point of view - the universe is observing itself growing potatoes, restoring calculators, and creating perfect references!

author: SiliconWizard
author_rank: Super Contributor
timestamp: January 29, 2020, 06:31:03 pm
content: Humans have been pondering that question for a very long time. Probably for as long as the different human species, as we define them, have existed.With our current knowledge, there's still not much of an answer to that, except that there's quite possibly no answer, so maybe we should just stop asking.

author: SilverSolder
author_rank: Super Contributor
timestamp: January 29, 2020, 07:06:56 pm
content: Something to do on a starry night... around a campfire...

author: blacksheeplogic
author_rank: Frequent Contributor
timestamp: January 29, 2020, 08:13:13 pm
content: Quote from: SilverSolder on January 29, 2020, 04:25:03 pmI don't see the point in growing potatoes unless your Irish, and why in the world would creating perfect references be at all important to the universe? It's like trying to make a case that TEA'ers collect useful stuff - ain't going to happen.

author: Electro Detective
author_rank: Super Contributor
timestamp: January 29, 2020, 09:58:15 pm
content: Any closet Flat Earthers lurking on EEVblog to get this post pumping past Page 1 ?

author: blacksheeplogic
author_rank: Frequent Contributor
timestamp: January 29, 2020, 11:54:38 pm
content: Quote from: Electro Detective on January 29, 2020, 09:58:15 pmThe Hollow Earthers are far more entertaining.

author: Mechatrommer
author_rank: Super Contributor
timestamp: January 30, 2020, 08:01:08 am
content: Garry Wills is much wiser than most... but he's not quite there yet, hopefully he'll have enough time to reach the destination...

author: tggzzz
author_rank: Super Contributor
timestamp: January 30, 2020, 10:21:15 am
content: Quote from: bjdhjy888 on January 28, 2020, 11:14:15 pmThis was done and dusted 42(!) years ago, by Zaphod Beeblebrox and his trip through the Total Perspective Vortex Analyser.

author: donotdespisethesnake
author_rank: Super Contributor
timestamp: January 30, 2020, 10:32:51 am
content: "What is the purpose of life?" One of the Big Three questions.It's become clear that life has no purpose, it just is what it is, and that situation is disappointing to a lot of people who feel the need for a purpose.The interesting question to me is why people think that life needs a purpose, and when that thought first appeared in our evolutionary history. As far as we know, other animals do not worry about having a purpose. It will be interesting to see if advanced AI starts asking the same existential questions we do, and maybe is a better sign of intelligence than the Turing test.

author: Mechatrommer
author_rank: Super Contributor
timestamp: January 30, 2020, 11:00:14 am
content: Animals are not given metacognition.. some homo sapiens too, to some extend dont use it very well, or not at all..

author: bsfeechannel
author_rank: Super Contributor
timestamp: January 30, 2020, 03:18:49 pm
content: We are a quantum fluctuation. Blame it on Heisenberg.

author: unknownparticle
author_rank: Frequent Contributor
timestamp: January 30, 2020, 03:58:02 pm
content: Humanity and indeed other life on earth has no cosmic significance, life is just a chance bio chemical occurance. Each individuals life is what they make it, good or bad, worthwhile (to humanity) or not, of any significance or not, etc, etc. I think it is incredible that humans have the ability to explore, discover and work out at least some of what is going on in the universe, I only wish I had the brains to be a scientist and do that too.Ulmtimately though, what ever humanity achieves for itself will all be lost and annihalated when the universe finally succumbs to it's ultimate fait, and nothing and no being will ever know of our existance. So, in effect, nothing actually matters.

author: paullo
author_rank: Newbie
timestamp: January 30, 2020, 04:32:14 pm
content: There were never any good old days, they are today, they are tomorrow. It's a stupid thing we say cursing tomorrow with sorrow

author: T3sl4co1l
author_rank: Super Contributor
timestamp: January 31, 2020, 04:30:48 am
content: To increase entropy.As a 'Murcan, I'm doing my part!Tim

author: RoGeorge
author_rank: Super Contributor
timestamp: January 31, 2020, 07:04:52 am
content: "Increasing entropy" that's how I was told, too.But when I look around I see a natural tendency toward structure. Everything tend to lump together and grow into more and more complex structures, from supposedly big-bang blob of energy to nicely behaved galaxies, planets, filaments, whatever. Same with matter we call as "alive". Same with other more "virtual" structures, like society, or even thoughts, as in thinking, apparently everything tend to self organize into more and more complex "something".For some reason, for now the Universe is busy doing exactly the opposite than diffusing itself into an eternal tranquility.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: January 31, 2020, 07:23:40 am
content: Entropy doesn't care about the superficial things you consider "order". A "structured" black hole contains far more entropy your genome does. (Than the sum genomes of all currently-known life? Guessing so.) The overall systematic march towards higher entropy, does not at all preclude localized order -- that's a strawman -- and indeed if local order leads to higher overall disorder, in time, all the better.Take even just the Earth for example. So much entropy locked away in fossil coal, stuck there for eons. Wouldn't have gone anywhere if not for humans!Tim

author: RoGeorge
author_rank: Super Contributor
timestamp: January 31, 2020, 09:36:22 am
content: Last phrase sounds like a guilt trip plug, but I'll assume it's just me.The other side of burning that that coal was at great help in adding even more structure to this world.First, it helped keeping more of us, the monkeys, alive. Then, some of that coal was used to melt sand into microprocessors, some other part is used as we speak to power those processors. Now, piles and piles of data are harvested and structured into databases and knowledge.But why would a database structure be of any relevance relative to real world structures we were talking, by real world thinking matter and energy?Without going into very bamboozling hypotheses like "we are living in a computer", there are clues that there is a direct equivalence between information and energy, the same equivalence as for the already accepted equivalence between energy and mass.One of the most screaming evidence for the "information is energy" idea is the Maxwell's demon gedankenexperiment. Apparently we would be able to get energy out of nothing if it were to have such a smart demon. However, the most reasonable explanation for why this doesn't happen, and there is no paradox in it, is because the experiment completely ignores information. The demon needs to know the velocity of each gas molecule (the state), and needs to know how they behave (the laws), so to anticipate when to slide the door open.By accounting the quantity of information required for such a demon to operate, and the quantity of energy "gained" because of the demon's "knowledge" while operating the door, we can conclude there is a direct equivalence between information and energy, and we can find an E = mc2formula, but between information and energy instead of between energy and mass.So, at an optimistic stretch, we burnt some coal (matter), gained some very well structured computers in the process, and lots of databases (information), which information is equivalent with energy, as we just showed, and energy is equivalent with mass, as it was already known.If transitivity applies between information (\$I\$), energy (\$E\$) and mass (\$M\$) then$$I \equiv E$$ as we just explained, and$$E \equiv M$$ because E = mc2, which leads to \$I \equiv M\$, or else said$$I \equiv E \equiv M$$which reads as..."all is one", but in a non-mystical sense.Information is energy is mass (well, here the word "is" has the meaning of "can be converted into" rather than the meaning of "are the same").In conclusion, we just structured the (local) Universe even more by burning those fossil fuels.I'm so proud of me and my fellow humans.We, the stupid monkeys, burning coal and lowering local entropy together!

author: T3sl4co1l
author_rank: Super Contributor
timestamp: January 31, 2020, 10:29:17 am
content: Quote from: RoGeorge on January 31, 2020, 09:36:22 amIt is what it is. It's probably not a healthy lifestyle for humans, but the planet overall isn't going to care. Egoists that we are, this is of course what we mean when we say we're "destroying the planet". It can't possibly be literal: physically destroying the planet would require the Sun'stotal power outputfor a week, an amount of power we simply don't have control of.QuoteWell, right, and thus you can calculate the amount of entropy that all of those things contain.I'll give you a head start: the entropy of any given material is not very different from any other.Very high purity silicon crystal sounds like a low entropy material, but it has about the same heat capacity, binding energy, etc. as everything else.So on a physical basis, we've drawn neat patterns in the sand, but all we have is still just a whole lot of sand, and the ocean of the cosmos is impossibly, unimaginably larger in comparison, ready to wipe away those patterns in an instant. (Gosh, that's kind of a threatening way to put it, but in perspective, over billions or trillions of years, that's not undeserved I guess.)Even if we had crafted "computronium", it's not obvious to me that it would have any higher or lower entropy than most other materials. It's going to be an incredibly complex substance compared to a crystal, sure -- perhaps it would even release a measurable amount of energy when melted and crystallized into its component elements (and assuming it doesn't store a lot of chemical energy). But that complexity means there's still more disorder left to go, and it need not be any higher entropy than, say, ordinary soda-lime glass.No, material entropy is a big nothing-burger. Doesn't even begin to register on our planet's energy balance, not by orders of orders of magnitude.The highest entropy activities we're doing right now, have to do with transformation of bulk materials (concrete, iron?), and motive power (everything we use fuels for). At least... that would be my guess.We pass around a truly insignificant amount of information. Our best computers are about 0.00001% efficient by an information-theoretic basis. And those computers only make up a negligible fraction* of our total material output. We're still very much in the industrial age, burning fuel for heat for the most part. Our computers are quite useful to us, driving an excitingly disproportionate sum of our economy -- but are utterly, impossibly humble compared to the physical limits of the universe.*In terms of, say, high-purity silicon output? Which is what, a few million tonnes over the history of semiconductors? We use gigatons of concrete and steelannually!Imagine how much potential we would have, if we committed that much materiel to computation alone! But then, we wouldn't even have the infrastructure or fuel reserves to power it, let alone the programs to run on it that would allow us to create and solve ever more advanced problems. Problems like, oh I don't know, synthesizing complete manufacturing processes for new, ever more efficient and powerful computers.That's the curse of the cave-man computation we are at: we aren't even advanced enough to save ourselves from our own inefficiency (again, in an information theoretic sense).What we have today is far beyond the wildest dreams of anyhumanof generations past, but we are at still such an incredibly early stage compared to the ultimate limits of these pursuits.In case my point is not yet clear --QuoteThe amount of coal we have burned is, I don't even know, I'd have to look it up -- say a million quads. 10^24 joules.The amount of information we possess is... something like 10^22 bits? Say that's stored at a whoppingone electronvolt per bit(which seems like a pretty safe level near room temperature, and given a little idle power to run error correction with). 1eV is 1.6e-19 J, so the sum knowledge of the human race amounts to, not even a candy bar's worth of energy with that kind of storage.Tim

author: iMo
author_rank: Super Contributor
timestamp: January 31, 2020, 10:36:36 am
content: The existence of our Universe and life on Earth is just a coincidence.

author: SilverSolder
author_rank: Super Contributor
timestamp: January 31, 2020, 12:27:44 pm
content: Is this about the right time to bring up Baudrillard simulacra?

author: DG41WV
author_rank: Regular Contributor
timestamp: January 31, 2020, 01:32:56 pm
content: Just do whatever your monkey brain tells you to do and try not to dig too deep. Ignorance is bliss.

author: unknownparticle
author_rank: Frequent Contributor
timestamp: January 31, 2020, 04:25:28 pm
content: Totally. There is sure to be an extinction level event just around the corner.

author: SeanB
author_rank: Super Contributor
timestamp: January 31, 2020, 06:51:28 pm
content: Question asked to the teacher, how did the universe as we know it form.In the early days of the universe it was incredibly hot, so much so that energies and temperatures were far in excess of the best we can achieve these days, even with the largest particle accelerators, with the highest energies we can safely contain. The original universe was a single point, which rapidly expanded, and slowly cooled down. Eventually it cooled down to the point where electrons could combine with protons to form neutral hydrogen, and the photons thus could travel in long paths without colliding. We can still see the remnants of this in the background radiation, though it is approaching absolute zero. Then the first suns formed, hot and bright, and they formed all sorts of exotic matter when they eventually went supernova, forming the first black holes. As the universe expanded, the time it took for light to travel from the furtherest points got longer than the time since the universe began, and some of the oldest objects were lost forever from view. Thus we cannot see the furtherest galaxies, though we know from empirical evidence and deduction that they must be there, as there are echoes of the mass imprinted on the background.Eventually the longest living brown dwarf suns also burnt out, forming the cool iron cores, which currently are circling the black holes illuminating the universe from Hawking radiation, giving us the energy we need to survive. There are occasional mergers of these black holes, but they are luckily not common, the radiation is deadly for large distances, energies approaching the early days of the universe, around 14 billion years after it was formed, out of a singularity quantum fluctuation. The odd iron core will fall in, but those events can be predicted long in advance, and we move far enough away so that we are not destroyed from the deadly heat.It is hard to imagine a universe where there is so much energy that material is not all a nice comfortable solid, with the exception of the life giving supercold helium we need to survive. imagine where things that we consider immutable, like hydrogen, carbon, iron and nickel, are hot enough that they actually flow, and can form gases that are incredibly corrosive to us, and where chemical reactions occur almost at the speed of light.However, this is only the introduction, and the full course material will be the occupation of those students who chose this course, and who complete the study period and pass. Class will occur at the beginning of the semester for those who qualify.

author: VK3DRB
author_rank: Super Contributor
timestamp: February 01, 2020, 12:17:53 am
content: Why are we here?Here are a few answers, some of which may be not politically correct:1.To finish the "To Do" list presented to me on my wedding day."And when you get to the bottom of the list, here is another one."2.To pay taxes upon taxes, unless you are super wealthy.3.To fill your brain with electronics theory.A form of self flagellation?4.To contribute to the bank accounts of the rich and powerful. After all, Bezos and Gates need more money, don't they?5.To love God with all your heart, mind, soul and strength. Boy have I fallen short - I often think about electronics. And finishing that dreaded list.6.To go forth and multiply.Yep done that, and I can even do long division without a calculator.7.Forty-two.and for the young...8.Your mobile phone.Actually the reason we are here is fundamentally is a very good question. But there will be an answer.A question I asked a minister once was "If your parents had never met, would you have been born?" His answer was... "Good question!"

author: Brumby
author_rank: Unknown
timestamp: February 01, 2020, 12:20:56 am
content: Quote from: bsfeechannel on January 30, 2020, 03:18:49 pmYou can't be certain about that.

author: Brumby
author_rank: Unknown
timestamp: February 01, 2020, 12:22:23 am
content: Quote from: Mechatrommer on January 30, 2020, 11:00:14 amRecursive thinking..... ?There's a disaster waiting to happen ... ... ... or has it happened already?

author: hamster_nz
author_rank: Super Contributor
timestamp: February 01, 2020, 01:02:59 am
content: Quote from: BravoV on January 29, 2020, 04:13:27 amGot to do something with all that low-entropy sunlight...I am more amazed with how slow life progresses. Things happen in pico and nanosecond timescales...

author: TerraHertz
author_rank: Super Contributor
timestamp: February 01, 2020, 02:25:03 am
content: All the evolutionary stages of non-sentient life have no 'purpose', they just are, like rocks and sky. Physical memes, ie assemblages of functional self-replicating information, instantiated in constructs of complex molecules, existing wherever energy flows and chemical conditions permit.Once sentience develops, it has the capability of choosing purpose for itself. However it still has to work its way through the thickets of many dysfunctional, parasitic worldview memes. Such as belief systems that insist 'purpose' is imposed from claimed external entities, without actually being able to demonstrate true sources or proof of concept.Eventually, if it's lucky, sentience arrives at a belief system that enables both personal choice of purpose, AND a functional scientific approach to learning and investigation of reality. If it's even luckier (or stronge enough) sentience can hold onto this, despite efforts of The Stupid to drag it back down into more primitive meme sets.And then... Sentience develops the branches of science required to effectively manipulate the underlying chemical coding schemes of their own physical bodies. Now it's a loop, with feedback. Genes --> physical form --> sentience --> genes.We're close to that point. Unfortunately it's a point past which all bets are off. There are infinitely many diverging paths, most with pretty grim destinations.Technology is incompatible with species. You can't maintain species consistency of code-base, when some individuals have the tech to modify their own code at will. Not to mention performing involuntary mass-edits (or kills) on others via contagious gene-editing vectors.However there are some paths, for some, that have great outcomes. It's all about the purpose you choose for yourself.Anyone have a good source of telomerase?----Btw, did you know the Wuhan corona-virus just happens to be highly selective for individuals of Asian genetic heritage?https://www.biorxiv.org/content/10.1101/2020.01.26.919985v1.fullSingle-cell RNA expression profiling of ACE2, the putative receptor of Wuhan 2019-nCovAnd some familiar names turn up...https://futurism.com/neoscope/recent-simulation-coronavirus-killed-65-million-peopleIncidentally, if you want to see a fine example of the variation of search result themes between google and duckduckgo, give each of them the search term "coronavirus patent Gates"Surely you didn't imagine such tools would be usedwisely?

author: RoGeorge
author_rank: Super Contributor
timestamp: February 01, 2020, 07:54:25 am
content: Quote from: SeanB on January 31, 2020, 06:51:28 pmAbout that, looking outside of our observable Universe is trivial if we start considering information, in this case memory is the key.All we have to do is to send a telescope near the edge of our observable sphere. The telescope will have it's own observable sphere, and some of that sphere will be outside of ours. So, the telescope can look for us outside of our own observable Universe, then re-transmit all to us. Same as in the ancient times, when people used to use smoke signals, or shouting orders from one to another in the battle.Hard in practice to have an outpost at the edge of the Universe, but perfectly doable in theory.

author: Nominal Animal
author_rank: Super Contributor
timestamp: February 01, 2020, 10:41:35 am
content: Quote from: RoGeorge on February 01, 2020, 07:54:25 amSince information can travel at most at the speed of light, by the time that information from the telescope arrives to us, our own observable universe has expanded to cover the telescopes observable universe at the time it sent the transmission.So no, that won't work.The volume of the universe we can observe expands at the speed of light. This has nothing to do with inflation, but just the fact that information travels at light speed.You canshiftthe sphere of the universe you can observe by moving, and observe things before others elsewhere in the universe, but when you transmit any information, by the time the information can arrive anywhere, the observable universe at the destination has expanded to cover the volume the information is about. You can do a simple flat 2D model of this, and visualize it easily; in 3D, it is a bit mind-boggling.

author: thinkfat
author_rank: Unknown
timestamp: February 01, 2020, 10:45:18 am
content: I am very fond of wearing my digital watch.

author: Circlotron
author_rank: Super Contributor
timestamp: February 01, 2020, 11:41:50 am
content: https://wol.jw.org/en/wol/d/r1/lp-e/1101993110

author: daqq
author_rank: Super Contributor
timestamp: February 01, 2020, 11:55:05 am
content: Quote from: Circlotron on February 01, 2020, 11:41:50 amSeriosly? Jehovists?

author: RoGeorge
author_rank: Super Contributor
timestamp: February 01, 2020, 03:17:35 pm
content: Quote from: Nominal Animal on February 01, 2020, 10:41:35 amNot sure I understand, but I see no reason why an outpost/relay won't work.Yes, the viewing range is increasing at the speed of light, but space itself in between expand even faster, so what we can see today at the very edge of the visible sphere, won't be possible to see tomorrow.The current mainstream physics agrees that the space keep "expanding", and at the edge of our viewing range the total expanding becomes "faster than light". That is why, with each day we will be able to see less and less stars, even thought the stars are still there. After minute 8:00 in the next video it is stated exactly this.The dude explaining is Dr. Don Lincolnhttps://en.wikipedia.org/wiki/Don_Lincoln, he has a PhD in physics and is currently working at the Fermi Lab, so it's safe to assume he's talking about mainstream physics in this video:

author: Ground_Loop
author_rank: Frequent Contributor
timestamp: February 01, 2020, 03:40:57 pm
content: The answer to your questions can be found in the Chart of Nuclideshttps://www-nds.iaea.org/relnsd/vcharthtml/VChartHTML.html

author: Nominal Animal
author_rank: Super Contributor
timestamp: February 01, 2020, 09:23:07 pm
content: Quote from: RoGeorge on February 01, 2020, 03:17:35 pmBy the time the information from the outpost reaches you, you can observe everything the outpost could at the moment it sent the information.You forget, information too is limited to the speed of light, and you do not observe things as they are at this moment, but how they were in the past; the further away, the deeper in the past.Consider a 2D example, with the observer at origin, and the Big Bang at time t=0. Excluding inflation (expansion of space), the edge of the observable universe is at distance r=ct. Let's say you have a probe at distance d; it too can observe a disk of radius r=ct. At time T, it observes X in the opposite direction of origin, at a distance of cT; thus, this something is at distance cT+d from origin. It sends the information from that to origin at light speed. The information arrives at time t=T+d/c. The radius of the observable universe at origin at time T+d/c is c(T+d/c) = cT+d. This means that origin itself can observe the point X by the time the information arrives, no matter what d is.Even if the universe expands, the only way the information about X can reach the origin faster via the probe than directly, is if the expansion is very non-uniform.Essentially, you are drawing a triangle, with the one side from X to origin, one side from X to probe, and the last from probe to origin. Your probe/observatory idea is essentially claiming that the length of the geodesics (shortest paths) from X to probe and from probe to origin, can be shorter than the geodesic directly from X to origin. When the probe is between X and origin, that is not possible in any geometry. When the probe is elsewhere, that is only possible in very weird geometries; stuff like folds in space.

author: RoGeorge
author_rank: Super Contributor
timestamp: February 11, 2020, 11:05:53 pm
content: Here's a short animation to help visualizing what I was trying to explain:- viewable range increases each day- space expands with time- speed of light is considered constantSpace expansion is not much, but over huge distances it all adds up while the speed of light is said to stay the same, so after enough distance the expansion will become faster than light. As a result, more and more stars are leaving our viewable range, even they are still shining.The Pale Blue Dot is the Earth, the red dot is the outpost with a telescope broadcasting what it sees from the outpost viewpoint. At some time in the future, even the outpost will run out of our reach, but for as long as the outpost is in our direct view, then we will receive what the outpost transmits (the view of all the stars inside the red circle), some of each we wouldn't be able to see without the outpost, because they are outside our green circle of direct view.Note how the circle of view slightly increase in size, yet stars keep migrating from the inside to the outside of any circle.Code:#!/usr/bin/env python2.7'''How to look outside our observable Universe using an outpost:-------------------------------------------------------------- the WHITE dots are the stars- The Pale Blue Dot is the Earth- the GREEN circle is the obsarvable Universe, looking from Earth- the RED dot is an outpost telescope, continuously broadcasting its view- the RED circle is the observable Universe, looking from the outpost- note that the circles' radius increases with time, at the speed of light, c- note that even the observable radius keeps increasing,with time the stars are leaving the observable circles because space expands- note how with time, will be less and less stars to view,even thought the stars are still shining out there,just that they are running away faster than the speed of light- by receiving the broadcasted view from the outpost,we will be able to study all the stars seen by the outpost,including the stars that otherwise will be outside of our direct reach,but are still reachable from the outpost viewpoint- after a while, even the outpost will run away outside our view'''import pygame as pgimport randomWIDTH = 1920HEIGHT = 1080ANIMATION_FPS = 10WHITE = (255, 255, 255)BLACK = (0, 0, 0)RED = (255, 0, 0)GREEN = (0, 255, 0)BLUE = (0, 0, 255)LIGHT_BLUE = (32, 64, 255)NR_OF_STARS = 2000INFLATION_COEF = 0.01OBSERVABLE_START_RANGE = 200class Dot:def __init__(self, x=0, y=0, color=WHITE, thickness=3):self.x = random.randrange(1, WIDTH-1)self.y = random.randrange(1, HEIGHT-1)self.color = colorself.thickness = thicknessself.x_now = self.xself.y_now = self.ydef __call__(self, x, y, color, thickness):self.x = xself.y = yself.color = colorself.thickness = thicknessdef xy_now(self, time=0):self.x_now = int(round(self.x * (1 + time * INFLATION_COEF)))self.y_now = int(round(self.y * (1 + time * INFLATION_COEF)))screen = pg.display.set_mode((WIDTH, HEIGHT))pg.display.set_caption("Observable vs Expansion")clock = pg.time.Clock()light_day = 1# populate the Universe with starsrandom.seed(1)stars = [Dot() for i in range(NR_OF_STARS)]# add Earth to the UniverseEarth = Dot()Earth(200, 150, LIGHT_BLUE, 10)stars.append(Earth)# add an Outpost to the Universe, inside the viewrange of the EarthOutpost = Dot()ox = Earth.x + int(round(3.0/4.0 * 2**0.5/2 * OBSERVABLE_START_RANGE))oy = Earth.y + int(round(2.0/4.0 * 2**0.5/2 * OBSERVABLE_START_RANGE))Outpost(ox, oy, RED, 5)stars.append(Outpost)# animation loopstopped = Falsewhile not stopped:# Frames Per Secondclock.tick(ANIMATION_FPS)for event in pg.event.get(): # User did somethingif event.type == pg.QUIT: # If user clicked closestopped=True # Flag that we are done so we exit this loop# Clear the display buffer and set the screen backgroundscreen.fill(BLACK)for star in stars:# Update the star positions as per today's view and draw the starstar.xy_now(light_day)pg.draw.circle(screen, star.color, [star.x_now, star.y_now], star.thickness)# Draw today observable ranges from Earth and from Outpostpg.draw.circle(screen, GREEN, [Earth.x_now, Earth.y_now], OBSERVABLE_START_RANGE+light_day, 1)pg.draw.circle(screen, RED, [Outpost.x_now, Outpost.y_now], OBSERVABLE_START_RANGE+light_day, 1)# Display the screen bufferpg.display.flip()pg.image.save(screen, "frame" + str(light_day).rjust(5, '0') + ".png")# A day passes with each framelight_day += 1pg.quit()

author: Mechatrommer
author_rank: Super Contributor
timestamp: February 12, 2020, 01:06:29 am
content: how can we possibly see something that we left at now greater than the speed of light relatively (the origin) we cant even look at whats inside the black hole right next to us. let alone sending outpost to the place that requires billions of light years to travel and then try to send back an information. all of that are... fancy assumptions... that we thought we went too far.

author: Nominal Animal
author_rank: Super Contributor
timestamp: February 12, 2020, 01:27:06 am
content: I understand, RoGeorge, but that's not how reality works. I am not sure how to explain it better to you.Distances we measure or estimate are actually the lengths of spacetime geodesics. One end is always in the past with respect to the other end.To get purely spatial distances, we need calculations that take the rate of the expansion of the universe (which has not been constant) into account.Consider a thought experiment. You have two points, A and B, one meter apart along a stretching wire. Ants appear one after another at A, each one touching the preceding and succeeding ant, and start walking towards B at a constant local velocityc. The rate of expansion of the wire is constant, but such that at least one ant from A will reach B. However, the ants also grow/stretch at the same rate as the wire (because light is also embedded in space), so consecutive ants will stay in touch. Will the stream of ants end at some point? No, but there may be a "last" ant that just continues to stretch and stretch, and never ends.Information behaves like those ants.Objects don't pass beyond the observable universe, just because the observable universe expands at a rate where the spatial separation between two points increases faster than the speed of light. The observable horizon is always atct, wherecis the speed of light in vacuum, andtis the age of the universe, and this distance or separation is measured as aspacetime geodesic, with one end in the past with respect to the other.What happens with light (and with gravitational waves, it is assumed) is redshift.Please read the Theory section of thecosmological inflation Wikipedia article. Essentially, although the universe expands, because of the exponential inflation during very early universe -- about 10-32seconds old universe expanded from the nanometer scale to ten lightyears --, light from different parts of the universe has not reached all other parts yet, these "causally connected patches" still expand; more and more regions come into contact. The "causally connected patch" is roughly what we call the observable universe.Like the ant analog, the causal patches never shrink, as they expand at the speed of lightat the boundary; nothing ever passes from inside a patch to outside a patch. Each passing second, more and more ant sources reach us for the first time. It is not the radius of the observable universe right now, in purely spatial terms, that expands at the speed of light.If we observe a quasar now, and note the information from it traveled to us for 12 billion years, the distance between it and usright nowis something like 40 billion light years. The spacetime geodesic is 12 billion lightyears long. Which is the "right" distance? This is also the problem with visualization of spacetime and the expansion of the universe.

author: nigelwright7557
author_rank: Frequent Contributor
timestamp: February 12, 2020, 01:38:52 am
content: Quote from: Mr.B on January 28, 2020, 11:18:24 pmWe are here through flukes of nature.Blame your parents for you being here.They give us the gift of life but also the gift of death too.The positive and negative universes add to make zero so it could be we really arent here.