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mobby_6kl posted:It's cool and I love the vehicles but man 2 minutes in microgravity is super underwhelming. What's the main limiting factor that's preventing them from going higher? It seems like there's plenty of space for more fuel so they should be able to accelerate it quite a bit more than that. The main limiting factor? A bunch of ex-Boeing/Lockheed Martin people in their management ranks who are used to slow-rolling everything to keep the paychecks flowing.
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Jun 29, 2023 22:32
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Jesus III posted:Why do you think UFOs are from space? Is there anything that points to space rather than unexplained natural phenomena or anything else? Who are you addressing with this?
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Jun 30, 2023 14:54
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Avi Loeb is so exhausting.
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Jul 7, 2023 22:17
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eXXon posted:Avi Loeb is so exhausting. lmao seriously, his clout chasing is so embarrassing. he really wants to be science worshipped
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Jul 8, 2023 10:30
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He’s completely ruined Event Horizon because it’s like he’s the cohost now and all they talk about are hypothetical ufo scenarios.
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Jul 8, 2023 13:46
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i don’t listen to any youtubes or podcasts where someone wants to talk about aliens. it’s so boring, like, i like to think about what ifs, too, this topic is overdone and nobody ever brings anything interesting or new to the table 10 ways aliens might be real 25 new answers to the fermi paradox relatedly i also avoid a lot of the science youtubes where someone needs to explain really hardcore science phenomena but they aren’t a subject matter expert.
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Jul 8, 2023 14:27
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eXXon posted:Avi Loeb is so exhausting. My respect and credibility for him all but cratered as soon as I read up on him and watched Angela Collier's criticism. The fact that he publishes such huge torrents of lovely short articles is really damning. Even his way of speaking is really tiresome!
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Jul 8, 2023 15:21
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DrSunshine posted:My respect and credibility for him all but cratered as soon as I read up on him and watched Angela Collier's criticism. The fact that he publishes such huge torrents of lovely short articles is really damning. Even his way of speaking is really tiresome! speaking of collier yeah you’ll also notice he has a way of talking to women that’s pretty gross like jill tarter, etc
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Jul 8, 2023 15:25
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Avi Loeb causing an international incident https://www.popularmechanics.com/space/a44349460/metallic-spherules-found-on-ocean-floor-are-they-from-aliens/ quote:According to the UK outlet The Times, the government of Papua New Guinea is accusing Loeb’s team of stealing the artifacts they have collected on their mission. The country’s National Research Agency claimed that the team never received a Marine Science Research permit (though they did apply for one), and that they entered the country on business visas instead of visas meant for scientific researchers. Stanis Hulahau, Papua New Guinea’s chief migration officer, even said that the team could face “criminal charges for removing ‘rare objects’ without notifying t Amazing
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Jul 16, 2023 03:02
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Jesus that's just atrocious. Ugh. Avi Loeb is officially worse than NDGT.
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Jul 16, 2023 04:04
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DrSunshine posted:Jesus that's just atrocious. Ugh. Avi Loeb is officially worse than NDGT. On a scale of NDGT to Michio Kaku, where would you place him?
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Jul 16, 2023 04:29
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Well, see, the thing is that unlike other "public intellectuals", the thing which distinguishes Avi Loeb as uniquely bad is the fact that he just stole artifacts from another country, and one of the poorest countries on earth at that! "Violating the laws of a foreign country" puts you on a different axis! On a scale of annoyingness, I'd put Avi Loeb above NDGT, who is quite far above Michio Kaku. In terms of smugness, Avi Loeb is just slightly below NDGT. In terms of Woo, Avi Loeb is in the middle between NDGT at one pole while Michio Kaku is at the other.
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Jul 16, 2023 04:54
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Oh hey new space thread. I can’t make heads or tails of the latest UAP stuff and it reads to me as more saying “it’s okay to report weird poo poo because it could be Chinese spy drones”. If they are aliens let’s use our strategic store of arguments against space interference to shame them into giving up the cargo.
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Jul 18, 2023 16:41
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Nessus posted:Oh hey new space thread. It’s the same as every time: there’s a lot of talk but no evidence.
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Jul 18, 2023 17:48
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JWST has detected objects consistent with interpretation as dark stars, the size of supermassive black holes, dating from a few hundred million years after the Big Bang. https://www.livescience.com/physics...ive-dark-matter https://arxiv.org/pdf/2304.01173.pdf I had never heard of these hypothetical objects until recently. Here's the general idea: Supersymmetry (which has no real empirical evidence as of yet) predicts particles called "neutralinos," the lightest of which is an good candidate a good candidate for a weakly interacting massive particle (WIMP) explanation of dark matter. These hypothetical neutralinos are Marjona fermions, which are fermionic superpartners of gauge and/or Higgs bosons. Unlike standard (anti-) matter, they are their own antiparticles, and so self-annihilate (this is because they have real-valued wave functions, whereas regular fermionic particles and anti-particles have complex ones related by conjugation). These particles could conceivably form the majority of the mass of the universe as dark matter, but only diffusely - such that the timescales of annihilation of the diffusely scattered particles are greater than the current age of the universe. In this scenario, most of the original dark matter may have already annihilated (most soon after the Big Bang), explaining that most of the energy-mass of the universe is dark energy (I might be wrong about this). Dark stars are objects that could have existed in the early universe under this scenario. They would have mostly been made up of normal matter by this point in the Universe's history, but would have had some neutralino dark matter. Also, they wouldn't have been dark - instead of fusion, they would create energy from neutralino annihilation. Nowadays, such supermassive clumps of matter would immediately collapse into black holes. The radiation pressure from fusion, or degeneracy pressure is not sufficient to prevent collapse. However, the annihilation of these neutralinos would provide enough pressure to prevent this. There could have also been normal stellar-sized dark stars, which would have densified and started to undergo fusion after the neutralinos were exhausted. Dark stars also aren't dark. They would emit a fuckton of radiation but be cooler and less dense overall. This result is not confirmed as of yet. The smoking gun would be a helium absorption line, rather than an emission line, at a particular wavelength. If true, this would have some pretty big implications in fundamental physics as well as being loving nuts. cat botherer fucked around with this message at 01:20 on Jul 20, 2023 |
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Jul 20, 2023 01:13
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cat botherer posted:JWST has detected objects consistent with interpretation as Hi-dilly-ho, neutralinos!
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Jul 20, 2023 02:48
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cat botherer posted:JWST has detected objects consistent with interpretation as That's loving wild!! We'll see how it goes as the scientific community digests it through peer review and other observations, but this could be huge if true. I mean, even proving supersymmetry and understanding the nature of dark matter would be massive!
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Jul 20, 2023 17:00
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Incredible if true, and far beyond what I was expecting from JWST. I gotta admit I never thought of dark stars as something other than a purely theoretical object. If this pans out, I wonder if all population iii stars were dark stars, or just a few.
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Jul 20, 2023 17:36
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There's a live stream of the congressional hearing on UAPs right now: https://www.youtube.com/watch?v=CgEisi_ozJ0
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Jul 26, 2023 15:41
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DrSunshine posted:There's a live stream of the congressional hearing on UAPs right now: There was no video or photos or anything proof related, right? Just that one guy basically being 'my friends told me there are aliens, trust me bro' I keep getting my hopes up and then it turns out to be nothing
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Jul 27, 2023 01:56
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It’s nothing until there’s incontrovertible proof that it’s something. If aliens were visiting the Earth, wouldn’t literally anything be different? If alien technology has been in the hands of the US and its contractors for ~100 years and they’ve never been able to learn anything from it, what difference would it make? I wish I knew what this guy was actually being prevented from learning about.
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Jul 27, 2023 02:10
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I AM GRANDO posted:It’s nothing until there’s incontrovertible proof that it’s something. If aliens were visiting the Earth, wouldn’t literally anything be different? If alien technology has been in the hands of the US and its contractors for ~100 years and they’ve never been able to learn anything from it, what difference would it make? I wish I knew what this guy was actually being prevented from learning about. That's kind of a jump. What if aliens just visited that day for the first time? Good luck then getting something useful out of alien technology besides maybe confirming it's not from Earth  But yeah, that hearing sounds like a waste of time
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Jul 27, 2023 12:32
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I AM GRANDO posted:It’s nothing until there’s incontrovertible proof that it’s something. If aliens were visiting the Earth, wouldn’t literally anything be different? If alien technology has been in the hands of the US and its contractors for ~100 years and they’ve never been able to learn anything from it, what difference would it make? I wish I knew what this guy was actually being prevented from learning about. So, if the claims put forth are taken at face value -- what Grusch had said about these UAP capabilities defying known laws of physics and so on -- then what that would imply is that all our known laws of physics and science are wrong, on a fundamental level. All of the Standard Model and General Relativity, which have been tested at accuracies up to one part in one hundred trillion and one part in ten trillion respectively, are essentially bullshit. We would need to rewrite everything from Newton on up. In fact, probably the basis of what we understand to be rationality itself would be undermined. I feel like if that was true, I'd feel incredibly sad and mournful.
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Jul 27, 2023 16:33
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DrSunshine posted:So, if the claims put forth are taken at face value -- what Grusch had said about these UAP capabilities defying known laws of physics and so on -- then what that would imply is that all our known laws of physics and science are wrong, on a fundamental level. All of the Standard Model and General Relativity, which have been tested at accuracies up to one part in one hundred trillion and one part in ten trillion respectively, are essentially bullshit. We would need to rewrite everything from Newton on up. In fact, probably the basis of what we understand to be rationality itself would be undermined. Not necessarily, there just may be a case those laws aren’t considering. Newtonian physics are “wrong” but they’re plenty right enough for most day to day uses. It’s only when you get very big or very fast that they break down. If the aliens are fitzing around with a different dimension (and I don’t believe there are aliens visiting us, fwiw) then it could be that our physics are fine in three spatial and one time dimension, but break down in another case we hadn’t considered yet.
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Jul 27, 2023 16:41
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DrSunshine posted:So, if the claims put forth are taken at face value -- what Grusch had said about these UAP capabilities defying known laws of physics and so on -- then what that would imply is that all our known laws of physics and science are wrong, on a fundamental level. All of the Standard Model and General Relativity, which have been tested at accuracies up to one part in one hundred trillion and one part in ten trillion respectively, are essentially bullshit. We would need to rewrite everything from Newton on up. In fact, probably the basis of what we understand to be rationality itself would be undermined. Science doesn’t really work that way. The dude’s lying and there aren’t any ufos, but if there were then whatever physics they’re doing would have to be compatible with what we know is true. GPS doesn’t invalidate anything in newtonian mechanics just because it requires relativity to operate, just like Mercury’s orbit doesn’t prove that gravity is false. Anything you can do with Newtonian physics is still possible. We already know that our current models are getting something wrong, since relativity and the standard model of particle physics are incompatible. Probably we’ll be able to do some cool new poo poo once we figure out what’s incomplete between them.
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Jul 27, 2023 16:54
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I AM GRANDO posted:Science doesn’t really work that way. The dude’s lying and there aren’t any ufos, but if there were then whatever physics they’re doing would have to be compatible with what we know is true. GPS doesn’t invalidate anything in newtonian mechanics just because it requires relativity to operate, just like Mercury’s orbit doesn’t prove that gravity is false. Anything you can do with Newtonian physics is still possible. I'd think that if the UAPs were clearly and obviously violating basic principles like non-locality, relativity, thermodynamics, the speed of light, and so on, but yet the same rules still applied to our everyday experience and measurements, then the case would be highly strengthened towards there being some kind of interference in our measurements, our perception of cause and effect. The simulation hypothesis -- or interference with our perception to such a severe extent that it reduces to the simulation hypothesis -- would gain a much higher credibility. In that case, we could not be sure that anything we measure or experience was not the direct result of some alien intelligence pulling the wool over our eyes, meaning that "true" reality might follow rules that were completely unknown to us. For example, what we observe to be the cosmic microwave background might actually just be a kind of illusion created at the boundaries of our solar system, or a kind of hologram, or even just bit-level alterations in our instrumentation created at the moment of measurement. My point is that if you accept the "UAPs are violating fundamental principles of physics" thesis, then we may as well toss out science entirely and return to mysticism.
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Jul 27, 2023 17:32
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The answer would be something like “the ufos aren’t technically objects with mass” or “the ufos aren’t technically moving through space” but actually shadows from a higher physical dimension or are made of weakly interacting particles or something. Just because you see something that should be impossible doesn’t mean that what you know is wrong—it just means that one of your premises needs adjustment. The answer would just be that what seems apparent, that an object is moving through the atmosphere in ways that would make it really hot or cause sonic booms etc, isn’t technically correct. That’s also the answer for what’s actually happening in those videos: in-camera effects like parallax shift or whatever make one thing appear to be another thing doing things it’s not actually doing.
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Jul 27, 2023 17:44
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The physical conditions required to create a situation where a Grand Unified Theory would be required are so extreme that we may never be able to actually use it in engineering. Obviously I can't rule out that there may be an easy way to access the new physics, but the fact that we don't observe anything behaving anomalously in a way that makes us think it needs the GUT to explain is a strong hint that there probably isn't a backdoor to new physics. This is also the reason we haven't been able to make much progress in actually finding the theory - we simply can't create the conditions needed to test the candidate theories.
Bug Squash fucked around with this message at 18:11 on Jul 27, 2023 |
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Jul 27, 2023 17:47
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Bug Squash posted:the fact that we don't observe anything behaving anomalously in a way that makes us think it needs the GUT to explain is a strong hint that there probably isn't a backdoor to new physics. That’s pretty direct circular reasoning. If the guys testimony were true, the there would be such observations. So there would be no reason to hold the theories as complete, and so no inherent reason to dismiss what he says. Still unlikely, but self consistent, so not actually impossible.
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Jul 28, 2023 12:33
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radmonger posted:That’s pretty direct circular reasoning. If the guys testimony were true, the there would be such observations. So there would be no reason to hold the theories as complete, and so no inherent reason to dismiss what he says.
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Jul 28, 2023 14:21
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So this isn't really space-related, but could someone with a physics degree please tell me what the deal is with the first room-temperature superconductor? Do you think it's bullshit? What's the deal?
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Jul 31, 2023 20:03
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I was under the impression it was submitted by a no name lab so it's probably just made up.
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Jul 31, 2023 20:07
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DrSunshine posted:So this isn't really space-related, but could someone with a physics degree please tell me what the deal is with the first room-temperature superconductor? Do you think it's bullshit? What's the deal? I don't think anyone knows yet but the good news is that it's pretty easy to replicate so we should know pretty soon Also it's so relatively easy and transformative that it's almost 'road not travelled' if it turns out to be correct (it's probably not) Although people are squabbling about attribution which is actually a good sign
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Jul 31, 2023 20:07
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You’re better off checking the physics and astronomy thread in (??? its under ask/tell).
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Jul 31, 2023 20:08
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im not a physics person but i will say from everything that seems to be going it is, if nothing else, seemingly not an intentional grift i.e., they think they have something. they’ve been working on it for some time. now whether they’ve got a superconductor or a new strongly diamagnetic material is anyone’s guess but imo it’s not worth too much postulation until a reputable lab goes through the steps themselves. supposedly argonne is working on it and anyway i’m betting we’ll get some kind of confirmation over the next month or two since the necessary materials for replication aren’t out of reach of many materials science labs i will say that all the people online purporting to know definitively what this substance is or is not mostly aren’t worth listening to since a basic physics degree isn’t necessarily going to be enough to understand all of it. anyway hopefully we’ll get replication soon and can decide then mediaphage fucked around with this message at 20:13 on Jul 31, 2023 |
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Jul 31, 2023 20:10
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Here’s a live updated table tracking people who are trying to replicate it? https://forums.spacebattles.com/thr...5#post-94266395
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Jul 31, 2023 20:13
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DrSunshine posted:So this isn't really space-related, but could someone with a physics degree please tell me what the deal is with the first room-temperature superconductor? Do you think it's bullshit? What's the deal? The physics thread covered it but it definitely doesn’t seem to be a superconductor. It may still be an interesting material but the levitation they exhibited didn’t really match what it should’ve looked like.
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Jul 31, 2023 20:15
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Yeah, as a physics-person I'd say this is  working as intended. They reported a result, and now others are trying to replicate the experiment and see what's up. We'll know soon enough (by science time terms), but I personally wouldn't be buying stock in whichever company that's prepared to mass-manufacture the material just yet.
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Jul 31, 2023 20:34
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https://www.theguardian.com/science/2023/aug/01/search-for-voyager-2-after-nasa-accidentally-sends-wrong-commandquote:Search for Voyager 2 after Nasa accidentally sends wrong command  Well this is bad! Though it's still wild to me how long Voyager 2 has lasted. This probe was launched like more than ten years before I was even born and it's still chugging away out there. Incredible engineering!
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Aug 1, 2023 18:50
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quote:Nasa concedes that the attempt to make contact through the huge dish antenna in Canberra is a long shot. If that effort comes to nothing, as engineers expect, mission controllers will have to wait until October when the spacecraft should reset automatically and restore communications. Poor little fella 
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Aug 1, 2023 18:56
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