Listen: Galaxy, Isaac Arthur, Hoda discussed on Beyond Reality Radio
"Thirteen thirty Cayenne s s. Welcome back to coast to coast AM, our guest tonight Isaac Arthur, and we are discussing Arthur's research that he has got in his video series over at science and future ISM, and the links for everything Isaac Arthur are over at coast to coast AM end, you need to go and check it out. It's nothing like taking notes and getting your learn on Isaac. We were discussing right before the break, the need to lead the planet mega structures and Dyson spheres all kind of interconnected certainly near world to and if we decided not to leave the planet for whatever reason population decreased, our resources were brought under control, and and we just decided not to do that is e also in that same position in that. That's where it maybe the Fermi paradox could come into play where they just don't wanna be bothered. Shall we say that we don't know what the answer the phone we paradoxes, of course, yet? And we have to have these filters that might be what causes than less common and one of the ones that get suggested is that we have many soldiers behind us. But we still have some and fund and one might be that just turns out that interstellar space travel is just not something that is possible a practical until we actually have fatal some walking colonies out. They all blown wanting to stall we really can't say for sure it might turn out that it's quite possible. But we just don't really want to do it too. Just because you can is Hoda doesn't mean do. Although I think that we probably will at some point. So lots of exploration we've done and we've never backed away from challenges. So I think that we would and I would tend to think any species that had developed while technology would too and then the breaking news last year, which I covered sort of you know, it's still in the news is tabby star. K I see a four six twenty eight fifty two I've got it memory. Right. That got to be pretty exciting. And I don't think the story has quite died yet. We haven't really solved it. But it certainly strongly suggested a mega structure, and that's what the news was reporting it as the possibility of an alien mega-structure. What did you think when the news first broke? I'm up I suppose taught it, and and I always tend to look at these things and say, especially from our standpoint discussing mega structural, if this wasn't make a structural what sort of make structural could it be and the ones we normally would discuss really fit the mockery out, which doesn't really mean. Too much you go back and ask NGOs, Rome. What a skyscraper is Modesto say. They probably gonna guess. So we don't know what format they might be building towards. But in in fitting, the ones we would normally say, and there have been quite a few suggestions for what it might be from an actual standpoint. But it's just one examples of things that you know, we really need to get about a look at and the next show telescopes. Well, hopefully, I'll tell us a lot more about objects that we find these anomalies, but we all constantly finding these kind of anomalies, and we learn something. Bit new and different about each one. But tabby stall is is you know, why though it's a natural source or something more official and a high tend to tilt toward the formal. It's gonna tell us a lot more about the universe around us. Years ago, not not well, not terribly long ago. But fifteen years ago, we had an excellent planet count of one. Up above one. Yeah. Right. Six thousand yet. Right. Yeah. Today. It's a it's over four thousand officially logged in another nine thousand that are that are way that that are discovered but haven't been given catalogs yet. But that's the that's where we're at today. And now in the last few years, certainly since you started your presentations now, the general understanding of our Milky Way is that we don't have ten planets out there. We don't have twenty. But that we have a hundred billion a hundred billion planets in our Milky Way. Now, it's an exciting. It's an exciting time to be an astrophysicist. Absolutely. Well, it's been exciting time since being fed the telescope, but these all great times, we could see so much more often. We it's really big telescopes. One hundred billion plant is probably an underestimate that might be how many all round stalls. Is that all reasonably enough like vote and close enough this Bill and son that they'd be warm enough to have live. But this, you know, probably going to be planning on almost every style. And I would not be surprised we've catalog trillions of of plants often Lotos zones. And then of course, you have all those dwarf plans to we'll probably find another one hundred. So that wasn't alone solar system of the small. Oh, neptune. Lloyd's. Sure. And the interview that I saw was a couple of weeks ago with an astronomer. He literally said if you want to go in find your own Exo planet, all you have to do is go to work for one night and you'll find one that's that's pretty nutty. It was this wasn't even a concept twenty years ago now now, and it's it is just amazing how much easier though, of course, they say that you do eat some decent Holloway to do that. But you can wheel finding. I stopped a lot fifteen thousand include the candidates, then b b almost every day. So that's right. Yeah. It's it's it's extraordinary now to populate. Now. Let's let's go back to where we set this up with to populate the the Milky Way to go out and discover and to expand and to grow you have to you have to increase your population. You have to find those resources, but eventually it's going to happen. Whether it's by us or by different civilizations. That are other. There could be millions of civilizations. We don't know or there could be one or two. But if it started how rapidly would our Milky Way, get overtaken. Probably about a million years tops. I if you're limited light speed and probably only factionalized point say ten percent of light speed. You can still colonize tile. Galaxy in a million years sounds like a lot of time to us, and it certainly isn't a short time, but compared to the age that galaxy it's it's about a second day. So it takes time to colonize galaxy assuming you have the technology and expansion for it. And we would also have to be to see something like this is it would have to be at the right place at the right time in that. We have only been observing our Milky Way as it is right now. I guess a sense Edwin Hubble, I guess if we go back, you know, nineteen Twenty-three nineteen twenty five so in a very very short window. We would have to be at the right place at the right time to see this occupation happen. Well, you have to be there about what's going on. What's taking place? It's sort of like, you know, seventy eighty thousand years ago. I can't remember that ashtray to that was they hypothesized, but they said it will only maybe a few hundred humans left, don't quote me on that novel. And yet now the whole plan is for if you look around now for people, it's very easy, find them. But in those early days, they'll be very hard to find. So if somebody got a headstone on us, you know, we would have any problems finding them and that kind of context so it does depending on who showed up forest how fast they expanding. And how many such civilizations exist? Is it just a few is that many poll? Galaxy is it only one post super quaestor? We just don't know yet in terms of the distribution with a SETI because we have to know what to look for is is said he doing the right thing. I mean, what what do we need to see what is it that we need to look for when we're looking for this expansion of the universe into the Milky Way. I wouldn't say it's really a thing about what city aims do. Is what it can. And either you look for the lowest hanging food force, which is to look for those radio signals. But you know, they they realist about this. We don't know that anybody would necessarily be using radio signals Omni directional radio signals like on right now, they might be using something that was a point to point like a laser. But you're they're looking for what the candidates the second half of that kind of research, which is just looking for, you know, things like Dyson spheres, very lowest Megan structural or k three civilizations, which is a galaxy spanning one. And it's not that when necessary are going to be able to find though is that we have a method to look for them that way. And that's of course. So you look for what you can have a decent chance of finding. It may not be the best way to look, but it's the wants to fail. And if we are out looking at with hobble, and we're starting to see galaxies disappear. Because that's one of the things that we would see if if Dyson spheres are being built around stars and blocking out the stars, and they take over a galaxy. Then that means the light from the galaxy would not be reaching us and technically the galaxy would start to disappear because it's being overtaken. Yes. And no for a classic Dyson Swamy or just transfer the visible light infrared waste heat. So you would be able to see that. And we'd be scanning for that. Of course, assumes they're using the same Atlantic's, we all which I think a pretty solid a lot though, Atlanta's we've only had two century. So somebody might find a walk around one day. In that kind of case you're gonna see the galaxy cash slowly disappear. And if those the kind of civilizations have come into existence the ones that just swarm out around the stalls and build massive collectors and habitats out each one. Then you'd actually be able to see these things disappear. And if they win you own galaxy you'd be wondering not who's living around those stalls. But what a stall was because you never see one day or two you had radio telescopes red telescopes 'cause night guy would be black right, right? And the the other part of this is our son is extremely stable. Okay. We we've had a pretty good run. We've met a pretty good run with our son. And it's not the case. Even in our own Milky Way, where you've got a son that hasn't radically changed in four five ten billion years because that's what it takes to to develop to develop life. I now every stall changes with time every one of them starts to warm up over time. We always talk about how the sun will one day expanded to being a vagina, but it actually gets a little bit warmer. Each year goes up inviting us by about one percent for hundred million years. I have to check that it just gets a little bit warmer with time and actually has been a paradise for us as we are wondering why the oth- would be habitable four billion years ago because my battle, but you cold based on sunlight, but we look out the stalls, and it'll be see how old they all. And how much to give an off based on their mass. And we say, wow, these ones are younger these ones auto to get off more live all son is remarkably stable, not freakishly south, but really quite stable, and we have no way of knowing how common zone plants like alone. All at this time. We don't know how often you're gonna get off like planet and one of those Jones, we don't know how many those stalls all stable enough and what stability we need. And we actually don't know that you really need a day off Leipheimer out of various sunlight son to two host life. It might turn out to be a much easier than we think. Is what my turn out that? We all right. If he underestimating how how easy it is for life to evolve to why is it that? Our universe. And when I say our universe. I firmly believe there are infinite universe's out there. We are just this is ours, but our universe with the big bang the way that it happened here. We have life. Things are created here. Right stars planets things elements gases photons electrons, everything it's it's just her fict- gravity was at the right spot at the right time the right numbers where we have life in this universe. But if it was just a fraction off if one of those numbers were off we could be a universe full of just lifeless dust, right? Oh, definitely. This is what we called off the fine tuning concept in general. And and to be fair. We don't really know exactly how that ranges or that. They might not be other other islands of stability where you might get something akin to chemistry going on for different laws. You know, change the speed of light a little bit change the strength of grad a little bit. And and things were not walk as they all right now, and especially can tell in most cases, they wouldn't walk it all get chemistry. But that's how to say by now. And of course, the look at that. We were at stake based on on what numbers people produce baffled basic models. The odds are so huge that you have to look at and say, well, we could just be these. Well, we won the lottery because there was a vast number so number of universes and this just happened to life at all. Maybe this is the only universe, and we really lucked out possibly to cyclic type of thing where just keeps poppy up expanding contracting or dying and getting a place until eventually you get one that walks with live. Oh, of course, the other options Allio potentially that was interesting, which Sony has many variations like well stimulation hypothesis all theological options, and we don't obviously have any way of no yet. We don't even have basic testable hypothesis. Well, how we'd find out? Well, when we run the numbers like the numbers of us having to take a break here in sixty seconds. When a when we run the numbers Isaac numbers are numbers. That's it. And the odds are the numbers say possibilities are endless anything is possible. And right now, there is another planet out. They're identical to this one where there's a a graduate in physics host talking to a radio host without that never left elementary school talking about the universe and the possibility of life out there and their names are Isaac and Jimmy.."