WEBVTT 1 00:00:03.439 --> 00:00:07.719 Welcome to Bedtime Astronomy. Explore the wonders of the cosmos 2 00:00:07.759 --> 00:00:12.279 with our soothing Bedtime Astronomy podcast. Each episode offers a 3 00:00:12.359 --> 00:00:16.320 gentle journey through the stars, planets, and beyond, perfect for 4 00:00:16.399 --> 00:00:20.239 unwinding after a long day. Let's travel through the mysteries 5 00:00:20.239 --> 00:00:22.440 of the universe as you drift off into a peaceful 6 00:00:22.480 --> 00:00:25.920 slumber under the night sky. 7 00:00:26.960 --> 00:00:29.600 Welcome everyone. Today, we are strapping in for a ride 8 00:00:29.800 --> 00:00:34.560 that might just completely upend our sense of cosmic orientation. 9 00:00:35.119 --> 00:00:38.600 We're asking a question that sounds incredibly fundamental, almost simple. 10 00:00:38.960 --> 00:00:42.000 How fast and in what direction is our solar system 11 00:00:42.039 --> 00:00:43.520 actually moving through the universe. 12 00:00:43.799 --> 00:00:45.960 It really does seem like a simple question, doesn't it. 13 00:00:46.439 --> 00:00:51.320 But the answer is, well, it's anything but. And trying 14 00:00:51.320 --> 00:00:54.439 to determine our absolute velocity relative to the most distant 15 00:00:54.439 --> 00:00:57.159 things we can see. That's not just some mapping exercise. 16 00:00:57.200 --> 00:01:00.000 It's a foundational taesk for how well we actually understand 17 00:01:00.119 --> 00:01:04.239 dan the very fabric of space, time and everything that's happened. 18 00:01:03.960 --> 00:01:06.840 Since the Big Bang exactly. We've been looking at some 19 00:01:06.879 --> 00:01:10.920 truly fascinating research that zeros in on measuring this specific velocity. 20 00:01:11.200 --> 00:01:13.760 The sources we're analyzing center around a huge study, a 21 00:01:13.879 --> 00:01:17.280 landmark study really published recently in Physical Review letters. It 22 00:01:17.319 --> 00:01:20.319 was led by an astrophysicist named Lucas Booma and his 23 00:01:20.400 --> 00:01:21.920 team at Beilafeld University. 24 00:01:22.200 --> 00:01:25.000 And our goal here is pretty straightforward. We need to 25 00:01:25.079 --> 00:01:29.239 unpack these findings because they deliver a serious, maybe even 26 00:01:29.280 --> 00:01:33.400 a fatal blow to one of the bedrock assumptions of 27 00:01:33.519 --> 00:01:37.519 the standard model of cosmology. And for you listening, we 28 00:01:37.599 --> 00:01:41.040 have to start with the really staggering conclusion based on 29 00:01:41.079 --> 00:01:44.319 their analysis of distant galaxies, the Solar system is moving 30 00:01:44.680 --> 00:01:48.319 get this, more than three times faster than every single 31 00:01:48.400 --> 00:01:50.319 existing cosmological model predicts. 32 00:01:50.560 --> 00:01:53.920 Three times faster. That sounds less like a scientific measurement 33 00:01:53.959 --> 00:01:56.480 and more like a cosmic speeding ticket. And this isn't 34 00:01:56.480 --> 00:01:59.640 some minor calibration error, right, This is a statistical deviation 35 00:01:59.719 --> 00:02:03.359 so vast that I'm quoting Brom here. It forces the 36 00:02:03.519 --> 00:02:08.599 entire scientific community to reconsider our previous assumptions, assumptions about 37 00:02:08.599 --> 00:02:10.280 how the universe is built on the largest scales. 38 00:02:10.319 --> 00:02:13.680 It's a genuine shockwave, and it's a shockwave precisely because 39 00:02:13.680 --> 00:02:16.879 it forces this confrontation with the most successful framework we 40 00:02:16.919 --> 00:02:19.960 have for understanding the universe. I mean, the standard model 41 00:02:20.000 --> 00:02:23.120 of cosmology, you know, land to CDM, has explained pretty 42 00:02:23.159 --> 00:02:25.400 much everything from the proportions of elements in the early 43 00:02:25.520 --> 00:02:28.199 universe all the way to the rate of cosmic expansion. 44 00:02:28.439 --> 00:02:30.680 It's the reigning champion of theories. 45 00:02:30.919 --> 00:02:34.120 It is so when a measurement comes along that contradicts 46 00:02:34.199 --> 00:02:38.159 this model, and does so with such incredible statistical certainty, 47 00:02:38.560 --> 00:02:40.919 scientists can't just ignore it. They can't just sweep it 48 00:02:41.000 --> 00:02:44.919 under the rug. They have to fundamentally test the foundations 49 00:02:44.960 --> 00:02:46.120 of reality itself. 50 00:02:46.240 --> 00:02:48.960 Okay, let's unpack the groundwork here before we get into 51 00:02:49.039 --> 00:02:53.840 this new, frankly shocking speed. We need to establish the baseline. 52 00:02:54.360 --> 00:02:56.800 Why is pinning down the speed of our solar system 53 00:02:57.000 --> 00:03:01.680 so crucial to our cosmological under standing. What's the fundamental 54 00:03:01.680 --> 00:03:02.759 principle it's testing. 55 00:03:03.000 --> 00:03:06.240 It's testing something we call the cosmological principle. And this 56 00:03:06.280 --> 00:03:08.879 principle is I mean, it is the unshakable foundation of 57 00:03:08.919 --> 00:03:12.719 all of modern cosmology. Essentially, it posits two things about 58 00:03:12.719 --> 00:03:14.599 the universe. When you look at it on the grandest 59 00:03:14.599 --> 00:03:17.479 scales past a few hundred million light years or so, 60 00:03:18.280 --> 00:03:20.960 it says the universe is both homogeneous and isotropic. 61 00:03:21.080 --> 00:03:24.360 Okay, So homogenating means it's mostly smooth and uniform, like 62 00:03:24.400 --> 00:03:26.240 a giant perfectly mixed soup. 63 00:03:26.439 --> 00:03:30.159 No big lumps exactly, no big lumps, and isotropy means 64 00:03:30.199 --> 00:03:32.280 it looks the same in every direction you look. There's 65 00:03:32.319 --> 00:03:35.240 no special direction, no preferred access, no up or down 66 00:03:35.280 --> 00:03:38.479 in the cosmos, no cosmic north star precisely. And if 67 00:03:38.520 --> 00:03:42.759 the universe really is homogeneous and isotropic, it has no center. 68 00:03:43.039 --> 00:03:45.800 That means gravity should be pulling more or less equally 69 00:03:45.840 --> 00:03:49.960 in all directions. On a large enough scale, our motion 70 00:03:50.159 --> 00:03:54.719 therefore should be relatively constrained. It should align with the 71 00:03:54.759 --> 00:03:59.319 overall flow of cosmic expansion and the small local gravitational 72 00:03:59.360 --> 00:04:03.039 tugs from our immediate cosmic neighborhood, things like the Virgo supercluster. 73 00:04:03.159 --> 00:04:05.560 I see. So the standard model doesn't just pull a 74 00:04:05.639 --> 00:04:08.680 speed out of thin air. It uses this assumption of 75 00:04:08.840 --> 00:04:13.400 large scale uniformity the cosmological principle to establish what you 76 00:04:13.400 --> 00:04:15.400 could call a cosmic rest frame. 77 00:04:15.560 --> 00:04:17.879 That's the perfect way to put it. The ultimate cosmic 78 00:04:17.920 --> 00:04:21.040 rest frame is defined by the cosmic microwave background, or 79 00:04:21.079 --> 00:04:25.120 the CNB. This is the faint afterglow radiation left over 80 00:04:25.120 --> 00:04:27.720 from the big bank. It fills the entire universe, and 81 00:04:27.759 --> 00:04:30.639 if you are truly at rest cosmologically, the CMB should 82 00:04:30.639 --> 00:04:33.439 look perfectly uniform, the same temperature no matter where you look. 83 00:04:33.480 --> 00:04:35.680 But we know we are moving relative to the CMB. 84 00:04:35.839 --> 00:04:37.920 That's something we've measured for decades. 85 00:04:37.600 --> 00:04:40.160 Right, we have, yes, and it's one of the great 86 00:04:40.160 --> 00:04:43.439 discoveries of modern cosmology. When we look at the CMB 87 00:04:43.639 --> 00:04:47.600 with sensitive instruments, we see a tiny but very distinct 88 00:04:47.720 --> 00:04:50.879 temperature asymmetry. One side of the sky is ever so 89 00:04:50.959 --> 00:04:54.000 slightly hotter, which means it's blue shifted, and the other 90 00:04:54.079 --> 00:04:56.480 side is slightly cooler or red shifted. 91 00:04:56.600 --> 00:04:58.439 This is the famous CMB dipole. 92 00:04:58.759 --> 00:05:01.839 That's the one, and it's a direct measurement. It tells 93 00:05:01.920 --> 00:05:05.199 us how fast we the Solar System are moving relative 94 00:05:05.240 --> 00:05:08.480 to the universe's background radiation. And that speed is about 95 00:05:08.519 --> 00:05:10.639 three hundred and seventy kilometers per second. 96 00:05:10.800 --> 00:05:13.319 So that's our expected baseline motion. That's the speed we 97 00:05:13.360 --> 00:05:15.639 should be going at because of all the known local 98 00:05:15.680 --> 00:05:19.240 gravitational influences and the overall expansion of the universe, the 99 00:05:19.279 --> 00:05:22.920 standard cosmological model is perfectly happy with that speed. 100 00:05:23.040 --> 00:05:26.240 Correct It all fits together very neatly. But and this 101 00:05:26.279 --> 00:05:29.319 is the crucial point, this new research wasn't measuring our 102 00:05:29.360 --> 00:05:32.199 motion relative to the CMB. It was measuring our motion 103 00:05:32.399 --> 00:05:37.079 relative to matter, specifically the distribution of incredibly distant galaxies. 104 00:05:37.120 --> 00:05:39.920 So two different rulers to measure the same thing exactly. 105 00:05:40.480 --> 00:05:43.560 The CMB gives us a benchmark for the very early universe, 106 00:05:43.879 --> 00:05:45.920 just a few hundred thousand years after the Big Bang, 107 00:05:47.120 --> 00:05:50.759 but the distribution of distant galaxies that provides a benchmark 108 00:05:50.800 --> 00:05:53.920 for the current large scale structure of the universe if 109 00:05:53.959 --> 00:05:57.199 the cosmological principle holds, if the universe is truly uniform, 110 00:05:57.759 --> 00:06:01.560 these two measurements are speedid relative to the CMB and 111 00:06:01.600 --> 00:06:05.240 our speed relative to all that distant matter. They should align. 112 00:06:05.519 --> 00:06:07.480 They should give us a very similar velocity. 113 00:06:07.879 --> 00:06:10.360 And this is where the contradiction just slams into you. 114 00:06:10.639 --> 00:06:14.399 Lead author Booma explicitly states his words that this new 115 00:06:14.480 --> 00:06:19.000 velocity measurement clearly contradicts expectations based on standard cosmology. 116 00:06:19.160 --> 00:06:22.240 It's so much more than just a deviation. The velocity 117 00:06:22.279 --> 00:06:25.120 they measured based on the actual material distribution of the 118 00:06:25.160 --> 00:06:28.120 universe is statistically forcing us to conclude that we're moving 119 00:06:28.160 --> 00:06:30.600 three times faster than we should be, and that translates 120 00:06:30.600 --> 00:06:33.439 directly into a much much stronger directional tug. It means 121 00:06:33.439 --> 00:06:35.959 that the universe as defined by where the galaxies are 122 00:06:36.120 --> 00:06:39.199 appears significantly less uniform than the universe as defined by 123 00:06:39.199 --> 00:06:40.879 that ancient microwave background light. 124 00:06:41.240 --> 00:06:44.000 Wow. Okay, so this presents a massive problem for the 125 00:06:44.040 --> 00:06:48.279 standard model. It suggests that either there is some truly monumental, 126 00:06:48.439 --> 00:06:52.759 previously unseen gravitational engine in our local universe that is 127 00:06:52.800 --> 00:06:53.959 accelerating us. 128 00:06:54.319 --> 00:06:57.480 Or the fundamental assumption that matter is spread out smoothly 129 00:06:57.519 --> 00:06:59.800 and uniformly across the cosmos is. 130 00:07:01.319 --> 00:07:04.959 Wrong, and that choice between a local gravitational anomaly and 131 00:07:05.160 --> 00:07:08.800 a fundamental structural flaw in the universe itself. That's really 132 00:07:08.800 --> 00:07:11.600 the entire pivot point of this whole discovery, isn't it is? 133 00:07:11.800 --> 00:07:14.279 And we can only really address that choice once we 134 00:07:14.439 --> 00:07:17.800 understand how on Earth it even made this detection, because 135 00:07:17.839 --> 00:07:20.000 you can't just use a regular telescope when you're looking 136 00:07:20.000 --> 00:07:21.000 that far back in time. 137 00:07:21.160 --> 00:07:23.920 That sets the stage perfectly for the technical side, how 138 00:07:23.920 --> 00:07:25.800 did they do it? How did they detect the speed? 139 00:07:25.839 --> 00:07:30.079 They needed an extremely distant, effectively fixed reference point, and. 140 00:07:30.079 --> 00:07:34.480 For that they chose radio galaxies as their cosmic markers. Now, 141 00:07:34.480 --> 00:07:37.720 these are not your average spiral or elliptical galaxies. These 142 00:07:37.720 --> 00:07:41.759 are very distant galaxies that are distinguished by these massive 143 00:07:41.800 --> 00:07:45.199 jets of particles. They're powered by supermassive black holes at 144 00:07:45.199 --> 00:07:50.160 their centers, and these jets emit incredibly powerful radio waves. 145 00:07:50.680 --> 00:07:54.759 That's a form of electromagnetic radiation with very very long wavelengths. 146 00:07:55.079 --> 00:07:57.959 And what is it about radio galaxies that makes them 147 00:07:58.040 --> 00:08:01.279 the ideal targets for this kind of measurement as opposed to, say, 148 00:08:01.439 --> 00:08:03.720 using standard optical telescopes like Hubble. 149 00:08:03.879 --> 00:08:09.279 The key advantage is observational depth and penetration. In space, 150 00:08:09.399 --> 00:08:12.839 visible light the kind our icee is easily scattered and blocked. 151 00:08:12.920 --> 00:08:15.920 It gets absorbed by cosmic dust, by gas clouds, by 152 00:08:15.920 --> 00:08:18.920 all sorts of intervening matter. So optical instruments can only 153 00:08:18.959 --> 00:08:20.720 see so far with perfect clarity. 154 00:08:20.759 --> 00:08:22.680 It's like trying to see through cosmic fog. 155 00:08:22.800 --> 00:08:25.720 A perfect analogy. But radio waves, because of their very 156 00:08:25.759 --> 00:08:29.199 long wavelengths, can essentially bypass that cosmic fog. They penetrate 157 00:08:29.240 --> 00:08:32.399 the interstellar and intergalactic medium far more effectively. They just 158 00:08:32.480 --> 00:08:33.440 sail right on through. 159 00:08:33.720 --> 00:08:37.759 So by using radio telescopes. These researchers can see much, 160 00:08:37.879 --> 00:08:41.120 much deeper into the cosmic structure. It gives them a 161 00:08:41.360 --> 00:08:45.679 vastly larger sample size of objects to establish that universal 162 00:08:45.720 --> 00:08:46.879 background reference frame. 163 00:08:47.120 --> 00:08:50.759 Exactly, you're counting objects that are so incredibly far away 164 00:08:51.240 --> 00:08:55.480 that their spatial distribution should perfectly reflect that large scale 165 00:08:55.559 --> 00:09:00.960 uniformity that the cosmological principle assumes. You really need billions 166 00:09:00.960 --> 00:09:03.960 of these faint sources to achieve the kind of statistical 167 00:09:04.000 --> 00:09:05.759 precision required for this measurement. 168 00:09:05.799 --> 00:09:09.360 Okay, so they have their targets billions of radio galaxies. 169 00:09:09.879 --> 00:09:12.639 Now let's get into the physical mechanism of detection. They 170 00:09:12.679 --> 00:09:15.519 aren't tracking a single galaxy over time like a police 171 00:09:15.600 --> 00:09:18.639 radar gun. They're looking at the distribution of all of them. 172 00:09:18.960 --> 00:09:22.240 So how does our solar system's motion translate into a 173 00:09:22.240 --> 00:09:25.480 discernible pattern in these light sources. Let's talk about this 174 00:09:25.519 --> 00:09:26.360 headwind principle. 175 00:09:26.480 --> 00:09:29.279 Okay. The headwind principle relies on a couple of relativistic 176 00:09:29.279 --> 00:09:31.240 effects that are tied to motion. The first is the 177 00:09:31.279 --> 00:09:33.840 Doppler effect, which most people are familiar with. The second 178 00:09:33.919 --> 00:09:35.360 is something called light aberration. 179 00:09:35.600 --> 00:09:38.519 Let's start with the familiar one, then the Doppler effect. Right, 180 00:09:38.600 --> 00:09:41.480 So if you're moving rapidly toward a stationary source of waves, 181 00:09:41.919 --> 00:09:44.960 sound or light, doesn't matter. The waves appear compressed to you, 182 00:09:45.279 --> 00:09:48.360 they get shifted to higher frequencies, and if you move away, 183 00:09:48.519 --> 00:09:52.240 they appear stretched out shifted to lower frequencies. Think of 184 00:09:52.279 --> 00:09:53.360 an ambulance. 185 00:09:52.919 --> 00:09:55.840 Siren, right, It gets higher pitched as it comes towards you, 186 00:09:55.960 --> 00:09:57.080 lower as it goes away. 187 00:09:57.320 --> 00:10:00.759 Exactly. Now, when you apply that to light, means objects 188 00:10:00.799 --> 00:10:04.679 were moving toward appear slightly brighter and bluer. That's the 189 00:10:04.759 --> 00:10:08.440 higher frequency part, and objects we're moving away from appear 190 00:10:08.559 --> 00:10:12.759 slightly dimmer and redder the lower frequency part. So this 191 00:10:12.879 --> 00:10:16.320 introduces a fundamental asymmetry in the intensity of the light 192 00:10:16.360 --> 00:10:17.960 we receive from different directions. 193 00:10:18.200 --> 00:10:21.399 That makes sense, But the researchers weren't just measuring the 194 00:10:21.440 --> 00:10:24.200 intensity of the light. They were counting the actual number 195 00:10:24.200 --> 00:10:26.320 of galaxies. So how does that work. 196 00:10:26.759 --> 00:10:29.679 That's where the second effect, light aberration, comes in. And 197 00:10:29.720 --> 00:10:31.919 this is really what the headwind metaphor is all about. 198 00:10:32.120 --> 00:10:34.840 Think of it like this. If you're running forward in 199 00:10:34.840 --> 00:10:37.559 the rain, even if the rain is coming straight down, 200 00:10:37.879 --> 00:10:39.639 more rain trops hit you in the face than on 201 00:10:39.679 --> 00:10:40.080 your back. 202 00:10:40.159 --> 00:10:41.320 Okay, I can picture that. 203 00:10:41.639 --> 00:10:44.799 It's a similar idea with light. Our motion through space 204 00:10:45.440 --> 00:10:49.399 causes a slight directional bending of the incoming light rays 205 00:10:49.679 --> 00:10:53.519 from these distant galaxies. So objects that are actually distributed 206 00:10:53.519 --> 00:10:58.279 perfectly uniformly across the sky will appear statistically to be 207 00:10:58.320 --> 00:11:01.240 slightly more concentrated in the direction of our velocity. We 208 00:11:01.279 --> 00:11:03.879 sort of sweep up more of them in our forward view. 209 00:11:04.080 --> 00:11:06.440 So to put it all together, if the Solar system 210 00:11:06.480 --> 00:11:10.440 is speeding toward the constellation Leo, we will perceive slightly 211 00:11:10.480 --> 00:11:13.720 more radio galaxies in that specific direction, a kind of 212 00:11:13.879 --> 00:11:18.200 subtle cosmic pile up, and this perceived asymmetry more galaxies 213 00:11:18.240 --> 00:11:20.279 counted in one direction than the opposite. That is the 214 00:11:20.320 --> 00:11:23.200 technical signature they're looking for. It's called a dipole anisocropy. 215 00:11:23.320 --> 00:11:26.440 Percisely, it's an anisotropy, a lack of uniformity that should 216 00:11:26.480 --> 00:11:29.120 be caused entirely by our own motion relative to that 217 00:11:29.200 --> 00:11:32.120 distant static background. But I really have to stress this again, 218 00:11:32.399 --> 00:11:35.600 this difference is absolutely minuscule. It's tiny. If the universe 219 00:11:35.639 --> 00:11:38.600 truly adheres to the standard model, this dipole should be 220 00:11:38.639 --> 00:11:42.840 incredibly faint. Detecting it requires counting sources in the billions 221 00:11:42.960 --> 00:11:45.240 and using instruments of just immense sensitivity. 222 00:11:45.559 --> 00:11:49.360 And to make those extremely sensitive measurements, the team relied 223 00:11:49.440 --> 00:11:52.240 on what might be the world's most impressive listening device, 224 00:11:52.840 --> 00:11:56.039 the Low Far telescope. The Low Frequency Array. 225 00:11:56.279 --> 00:12:00.360 Lo FAR is absolutely critical to this discovery. It's important 226 00:12:00.399 --> 00:12:03.120 to understand it's not a single massive dish like you 227 00:12:03.200 --> 00:12:06.919 might picture. It's a network of thousands of small antenna 228 00:12:06.919 --> 00:12:09.879 stations that are spread out across several countries in Europe, 229 00:12:10.279 --> 00:12:13.799 and they're all linked together electronically to act as one 230 00:12:13.879 --> 00:12:14.919 giant telescope. 231 00:12:15.080 --> 00:12:19.200 So that distributed nature, having antennas so far apart, that 232 00:12:19.279 --> 00:12:22.720 gives them an unparalleled baseline right the distance between its 233 00:12:22.759 --> 00:12:26.639 farthest components, and that translates to incredible angular. 234 00:12:26.240 --> 00:12:31.080 Resolution, incredible resolution and immense sensitivity, especially for detecting these 235 00:12:31.200 --> 00:12:34.840 very faint low frequency radio waves from the early universe. 236 00:12:35.240 --> 00:12:37.960 They could map the distribution of these radio galaxies with 237 00:12:38.000 --> 00:12:41.480 a precision that previous single dish telescopes simply couldn't dream 238 00:12:41.480 --> 00:12:42.039 of achieving. 239 00:12:42.360 --> 00:12:44.440 So they took the primary data from lo FAR, and 240 00:12:44.480 --> 00:12:47.000 the sources say they combine it with information from two 241 00:12:47.080 --> 00:12:50.919 additional radio observatories. I assume that's to cross check their data. 242 00:12:51.279 --> 00:12:54.399 Yes, to ensure their galaxy count was as comprehensive and 243 00:12:54.440 --> 00:12:57.360 accurate as possible, to make sure they weren't missing anything. 244 00:12:58.159 --> 00:13:01.000 But their challenge wasn't just collecting all this data, it 245 00:13:01.080 --> 00:13:04.000 was analyzing it accurately, and that led to a really 246 00:13:04.080 --> 00:13:05.399 key part of their work. 247 00:13:05.480 --> 00:13:09.440 The statistical innovation. The sources note that the team needed 248 00:13:09.480 --> 00:13:13.799 a new statistical method, specifically because many radio galaxies consist 249 00:13:13.879 --> 00:13:17.039 of multiple components. Why was that such a big hurdle? 250 00:13:17.320 --> 00:13:20.120 Well, imagine you're trying to count distant street lights from 251 00:13:20.159 --> 00:13:23.879 a satellite. But sometimes a single street light isn't just 252 00:13:23.919 --> 00:13:26.559 one bulb. Maybe it's a big sign with two or 253 00:13:26.600 --> 00:13:29.960 three separate light bulbs very close together. If your telescope 254 00:13:29.960 --> 00:13:32.159 doesn't have the resolution to distinguish them as part of 255 00:13:32.200 --> 00:13:35.000 a single sign, you might count three lights when you 256 00:13:35.000 --> 00:13:37.840 should really only be counting one originating source. 257 00:13:38.200 --> 00:13:40.480 Ah. I see, And if you don't account for those 258 00:13:40.559 --> 00:13:45.000 multi component sources correctly, you could artificially inflate or skew 259 00:13:45.120 --> 00:13:47.559 your galaxy counts in certain areas of the sky, which 260 00:13:47.559 --> 00:13:50.159 would ruin the whole measurement exactly right. 261 00:13:50.440 --> 00:13:54.720 Radio galaxies are often these incredibly complex structures. You've got 262 00:13:54.759 --> 00:13:57.000 the central core where the black hole is, and then 263 00:13:57.000 --> 00:14:01.480 you have these two massive radio lobes, these jets extending 264 00:14:01.639 --> 00:14:05.320 far out into space on either side. The oldest statistical 265 00:14:05.360 --> 00:14:08.440 methods often struggled with this. They would sometimes treat these 266 00:14:08.480 --> 00:14:10.240 lobes as separate sources from the core. 267 00:14:10.559 --> 00:14:13.600 So the new statistical method developed by Boomis team was 268 00:14:13.679 --> 00:14:16.559 designed to be smarter about that, to recognize that a 269 00:14:16.679 --> 00:14:19.120 core and its two lobes are all part of one 270 00:14:19.200 --> 00:14:20.120 single galaxy. 271 00:14:20.240 --> 00:14:23.919 Yes, it counts for this multi component nature, ensuring that 272 00:14:23.960 --> 00:14:28.000 the team was counting distinct originating galaxies rather than just 273 00:14:28.039 --> 00:14:30.639 counting the individual bright parts of a single galaxy. 274 00:14:30.679 --> 00:14:33.519 And this methodological rigor is so important because the source 275 00:14:33.519 --> 00:14:36.240 material points out something that I found really interesting. This 276 00:14:36.399 --> 00:14:40.759 improved analysis yielded measurement uncertainties that were larger but also 277 00:14:40.840 --> 00:14:42.159 more realistic. 278 00:14:41.960 --> 00:14:45.159 And that is a huge sign of robust, honest science. 279 00:14:45.759 --> 00:14:49.840 When scientists report larger, more realistic uncertainties, it means they've 280 00:14:49.879 --> 00:14:52.799 been conservative. It means they have fully acknowledged the inherent 281 00:14:52.840 --> 00:14:57.279 imperfections and complexities of measuring this kind of data across 282 00:14:57.720 --> 00:15:00.759 vast cosmic distances. They weren't trying to make their data 283 00:15:00.799 --> 00:15:03.360 look tidier or more certain than it actually was. 284 00:15:03.559 --> 00:15:06.200 And despite introducing these larger uncertainties, which should make it 285 00:15:06.200 --> 00:15:07.000 harder to claim a. 286 00:15:06.960 --> 00:15:11.360 Discovery, the measured signal was so powerful, so strong that 287 00:15:11.480 --> 00:15:15.480 it still completely defied the standard model's expectations. 288 00:15:14.679 --> 00:15:17.399 And that leads us directly to the statistical weight of 289 00:15:17.399 --> 00:15:20.120 this finding. This is where the conversation turns from just 290 00:15:20.200 --> 00:15:23.879 methodology to a genuine discovery. We have to talk about 291 00:15:23.919 --> 00:15:27.639 five sigma. Even with the larger, more realistic uncertainties applied 292 00:15:27.679 --> 00:15:31.720 by their new statistical method, the deviation from expectation exceeded 293 00:15:31.720 --> 00:15:32.519 five sigma. 294 00:15:32.600 --> 00:15:36.159 Five sigma is the gold standard of scientific discovery, especially 295 00:15:36.159 --> 00:15:39.480 in particle physics and cosmology. To put that into context 296 00:15:39.480 --> 00:15:42.519 for you, in many fields, a three sigma result is 297 00:15:42.559 --> 00:15:46.000 considered pretty interesting. It's evidence of a signal, it makes 298 00:15:46.000 --> 00:15:49.879 people pay attention. But five sigma. Five sigma means that 299 00:15:49.919 --> 00:15:53.480 the probability that this result is just a statistical fluke, 300 00:15:53.600 --> 00:15:55.960 some random error in the data that will vanish if 301 00:15:56.000 --> 00:15:58.240 you measured again, is less than one in three point 302 00:15:58.320 --> 00:15:58.879 five million. 303 00:15:58.960 --> 00:16:01.120 One in three point five five million. It is the 304 00:16:01.159 --> 00:16:04.360 threshold for popping the champagne and shouting we found something 305 00:16:04.399 --> 00:16:08.279 new in physics. Why is such a stringent threshold necessary, 306 00:16:08.320 --> 00:16:10.240 particularly in a field like cosmology. 307 00:16:10.519 --> 00:16:13.360 It's because the theories you're testing, like the standard model, 308 00:16:13.639 --> 00:16:17.639 are so incredibly successful and so fundamental. If you're going 309 00:16:17.720 --> 00:16:19.960 to stand up and claim you found something that fundamentally 310 00:16:19.960 --> 00:16:23.120 breaks decades of established physics, you had better be virtually 311 00:16:23.159 --> 00:16:26.279 certain that your instrument or your analysis hasn't somehow misled you. 312 00:16:26.639 --> 00:16:29.480 Five signal provides a statistical certainty. It's the community's way 313 00:16:29.480 --> 00:16:32.799 of saying, Okay, this isn't noise. This discrepancy is physically real. 314 00:16:33.120 --> 00:16:37.000 And what exactly is this robust physical discrepancy they found? 315 00:16:37.279 --> 00:16:40.039 It's the specific anisotropy that dipole that we are just 316 00:16:40.080 --> 00:16:40.840 discussing right. 317 00:16:40.879 --> 00:16:43.720 Their measurement shows that the directional asymmetry and the distribution 318 00:16:43.759 --> 00:16:46.960 of all those radio galaxies, that dipole is quantified as 319 00:16:47.000 --> 00:16:50.120 being three point seven times stronger than what the standard 320 00:16:50.120 --> 00:16:51.240 model predicts it should be. 321 00:16:51.840 --> 00:16:55.559 So the measured headwind is three point seven times stronger 322 00:16:55.600 --> 00:16:58.360 than the model allows. And if the strength of that 323 00:16:58.399 --> 00:17:02.639 dipole directly correlates with our velocity relative to those distant sources. 324 00:17:03.039 --> 00:17:05.240 Then our solar system must be traveling three point seven 325 00:17:05.279 --> 00:17:08.519 times faster than the expected cosmological speed. That is the 326 00:17:08.519 --> 00:17:09.119 core finding. 327 00:17:09.160 --> 00:17:11.440 That is the core finding. It's not just a small deviation. 328 00:17:11.559 --> 00:17:14.799 It's a profound conflict. If the distribution of matter in 329 00:17:14.839 --> 00:17:18.039 the universe were truly uniform, and if we were moving 330 00:17:18.079 --> 00:17:21.839 at the expected CMB derived velocity, the dipole that low 331 00:17:21.880 --> 00:17:25.799 Far measured would be much much weaker. This excessive strength 332 00:17:25.839 --> 00:17:29.119 indicates a velocity that is wholly incompatible with a smooth, 333 00:17:29.240 --> 00:17:30.240 uniform universe. 334 00:17:30.519 --> 00:17:32.920 What's so fascinating here, and what makes this so compelling, 335 00:17:33.000 --> 00:17:35.000 is that the scientists didn't just stop at their own 336 00:17:35.039 --> 00:17:39.799 lofar data. They proactively sought independent validation. And that's the 337 00:17:39.839 --> 00:17:42.680 critical step that elevates this from just an interesting result 338 00:17:43.000 --> 00:17:46.160 to a potential paradigm shift. The paper says, the new 339 00:17:46.200 --> 00:17:50.559 results confirm earlier observations based on studying quasars. 340 00:17:50.839 --> 00:17:54.440 This step is absolutely non negotiable for a claim this large. 341 00:17:54.480 --> 00:17:58.880 You have to do this. Let's define quasars clearly for everyone. 342 00:17:59.079 --> 00:18:00.960 They are the super mass of black holes at the 343 00:18:01.079 --> 00:18:04.839 very heart of distant active galaxies. They're in the process 344 00:18:04.839 --> 00:18:07.759 of consuming enormous amounts of matter, and as they do, 345 00:18:08.079 --> 00:18:10.079 they heat up and emit so much energy that they 346 00:18:10.119 --> 00:18:12.799 can outshine their entire host galaxy. They are the brightest 347 00:18:12.799 --> 00:18:13.839 beacons in the universe. 348 00:18:14.039 --> 00:18:17.000 So why is the quasar confirmation so important here? What 349 00:18:17.119 --> 00:18:19.119 makes it such a powerful piece of evidence. 350 00:18:19.400 --> 00:18:22.240 It's because the earlier studies that found a similar effect 351 00:18:22.559 --> 00:18:26.799 were looking at quasars using infrared data. Now, think about 352 00:18:26.839 --> 00:18:30.559 the difference there. The Boom study used radio waves, very 353 00:18:30.559 --> 00:18:34.400 low frequency, very long wavelength, and focused on radio galaxies, 354 00:18:34.400 --> 00:18:39.079 which are defined by their extended jets. The earlier confirming 355 00:18:39.200 --> 00:18:43.160 studies used infrared light, a much higher frequency, shorter wavelength, 356 00:18:43.440 --> 00:18:48.039 and focused on the extremely bright, compact central cores of quasars. 357 00:18:48.119 --> 00:18:51.079 So the detection method was entirely different. They were using 358 00:18:51.119 --> 00:18:53.880 a different part of the electromagnetic spectrum, and they were 359 00:18:53.920 --> 00:18:57.640 measuring completely different types of distant objects, and yet they 360 00:18:57.720 --> 00:18:59.680 yielded the same unusual effect. 361 00:19:00.079 --> 00:19:02.920 This is the scientific clincher. It's what makes the result 362 00:19:03.000 --> 00:19:07.359 so hard to dismiss. If two entirely independent observational techniques, 363 00:19:07.440 --> 00:19:11.039 using two different cosmic marker populations, two different spectral bands 364 00:19:11.160 --> 00:19:14.400 and two completely different instruments setups. If they both point 365 00:19:14.440 --> 00:19:19.480 to the exact same massive, statistically significant directional asymmetry, then 366 00:19:19.519 --> 00:19:21.200 the signal is almost certainly genuine. 367 00:19:21.359 --> 00:19:23.960 It's not a fluke in the Lofar and Tennis exactly. 368 00:19:24.119 --> 00:19:27.799 Yes, strongly suggests that this massive velocity they detected is 369 00:19:27.839 --> 00:19:31.519 a real feature of our motion through the cosmic matter distribution, 370 00:19:32.039 --> 00:19:34.960 and not some weird systematic error in the lo far 371 00:19:35.000 --> 00:19:38.680 instruments with some peculiar property of how radio galaxies emit light. 372 00:19:39.039 --> 00:19:42.359 And this just moves the conversation entirely away from questioning 373 00:19:42.359 --> 00:19:45.720 the instruments and directly to questioning the fundamental laws of cosmology, 374 00:19:46.119 --> 00:19:49.720 which leaves us with the inevitable and frankly enormous question, 375 00:19:50.200 --> 00:19:52.559 if the measurement is correct, what has to be wrong 376 00:19:52.599 --> 00:19:54.319 about our understanding of the universe. 377 00:19:54.599 --> 00:19:56.960 Well, if we connect this to the bigger picture, the 378 00:19:57.119 --> 00:20:00.319 entire framework of cosmology is now under a huge amount 379 00:20:00.359 --> 00:20:03.119 of stress. A co author on the paper, a Professor 380 00:20:03.119 --> 00:20:07.079 Dominic J. Schwartz, he frames the situation perfectly. He says, 381 00:20:07.119 --> 00:20:09.359 if the Solar system is truly moving this fast, we 382 00:20:09.400 --> 00:20:13.759 are forced to question fundamental assumptions about the large scale structure. 383 00:20:13.440 --> 00:20:15.759 Of the universe, and the research has laid out two 384 00:20:15.880 --> 00:20:19.599 major alternatives, two really distinct ways to interpret this excess speed, 385 00:20:20.119 --> 00:20:23.920 and these two hypotheses force cosmologists down two radically different 386 00:20:23.960 --> 00:20:26.640 theoretical roads. Let's break down the first one. We can 387 00:20:26.640 --> 00:20:29.359 call it the kinematic hypothesis or hypothesis A. 388 00:20:29.880 --> 00:20:34.359 Okay, so, hypothesis A basically says the universe's uniform on 389 00:20:34.480 --> 00:20:39.079 large scales. It says the cosmological principle still holds. Therefore, 390 00:20:39.480 --> 00:20:43.240 the conclusion must be that our solar system's motion is 391 00:20:43.839 --> 00:20:48.519 genuinely physically far faster than we expected. The measurement is 392 00:20:48.559 --> 00:20:50.480 a measurement of our actual speed, and. 393 00:20:50.480 --> 00:20:53.319 If that's true, it means there has to be some enormous, 394 00:20:53.720 --> 00:20:58.319 previously undetected gravitational force that's responsible for accelerating us at 395 00:20:58.359 --> 00:20:59.279 this unexpected rate. 396 00:20:59.480 --> 00:21:02.319 Precisely, we know about the gravitational pull of the Virgo 397 00:21:02.400 --> 00:21:05.680 supercluster and the local group of galaxies, and our general 398 00:21:05.720 --> 00:21:09.119 flow toward the Shapley supercluster what's sometimes called the Great attractor. 399 00:21:10.079 --> 00:21:12.880 But all of those known forces are already factored into 400 00:21:12.880 --> 00:21:16.240 the expected velocity of three hundred and seventy kilometers per second. 401 00:21:16.519 --> 00:21:18.960