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Into the Impossible With Brian Keating

What Is 3I/ATLAS? Avi Loeb - #534

Into the Impossible With Brian Keating

Brian Keating

Physics, Natural Sciences, Science

4.71.1K Ratings

🗓️ 23 December 2025

⏱️ 73 minutes

🧾️ Download transcript

Summary

Please join my mailing list to get FREE notes and resources from this show, plus your chance to win a real meteorite: http://briankeating.com/yt Join us LIVE with Harvard astrophysicist Avi Loeb for the final verdict on the interstellar object 3I/ATLAS, the third confirmed visitor from beyond our solar system. We examine the newly proposed 14th anomaly: the remarkably rare alignment of 3I/ATLAS’s rotation axis within about 8 degrees of the sunward direction at distances greater than 5 AU, a configuration with a probability of less than about 0.5 percent if random. This alignment has major implications for how we interpret the object’s anti-tail jet geometry, rotational dynamics, and overall physical behavior, adding to a growing list of anomalies that strain standard cometary explanations. Whether you are interested in jets, rotation periods, anti-tail physics, or what these observations imply about natural versus technological origins, this livestream offers a rigorous, evidence-driven deep dive. We will lay out the data, compare competing interpretations, and ask the central question: is 3I/ATLAS simply an unusual comet, or something fundamentally different? - Run of Show 00:00 – 02:00 Intro and context: Discovery of 3I/ATLAS, orbital properties, and why it has drawn intense attention. 02:00 – 05:00 What is an interstellar object: Comparison with 1I/Oumuamua and 2I/Borisov. 05:00 – 10:00 Anomalies 1 through 5: Brief recap of the earliest reported oddities, including trajectory and activity. 10:00 – 15:00 Anti-tail observations and physics: Explanation of the sunward anti-tail and why it is unusual. 15:00 – 20:00 Rotation period and periodic behavior: Discussion of the roughly 15.5 to 16.2 hour signal and its interpretation. 20:00 – 25:00 Recap of the first 13 anomalies: How they are ranked by likelihood and what they suggest. 25:00 – 30:00 The 14th anomaly: rotation-axis alignment: Geometry, probability estimates, and why this feature stands out. 30:00 – 35:00 Possible mechanisms for axis alignment: Assessment of natural processes versus alternative explanations. 35:00 – 40:00 Jet collimation and structure: Why the sunward jet remains narrow and persistent. 40:00 – 45:00 Implications for outgassing models: Where standard cometary physics succeeds or fails. 45:00 – 50:00 Natural versus non-natural scenarios: Clear comparison of competing hypotheses. 50:00 – 55:00 Future observations and missions: What additional data could resolve the debate. 55:00 – 60:00 Audience Q and A: Live questions with Avi Loeb. 60:00 – 65:00 Wrap-up and final thoughts: Synthesis of the evidence and implications for future research. Learn more about your ad choices. Visit megaphone.fm/adchoices

Transcript

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0:00.0

All right. We are live and it is exciting to welcome. My good friend Avi Loeb all the way from

0:18.8

Chile, Boston. It's chilly here in San Diego.

0:21.1

How is it there in Boston, Avi?

0:23.2

Well, it's very cold.

0:24.5

It was five degrees below zero.

0:28.4

Water would have frozen, but there wasn't any water, so I could jog before sunrise this morning.

0:35.3

Oh, that's right.

0:36.1

That's your calling card.

0:37.0

You're jogging for me in spirit. I'm with you in that's right. That's your calling card. You're jogging for

0:37.7

for me in spirit. I'm with you in spirit, Avi. It's not, it's not that easy for me to get up

0:43.9

so early at that time. But I'm trying. You inspired me. This year, I dropped five pounds, Avi,

0:49.2

from my chin to my stomach. So you inspired me, Avi, and you may continue to do so in the new year.

0:56.1

So this has been a wild year. We started talking about phenomena way back. We've talked for

1:01.7

half a decade already, or known each other for more than a decade now. But we'd start talking

1:07.0

about this mysterious object, three eye atlas, which some said, you know, could be

1:11.7

technology. It could be something reminiscent of consciousness or maybe it's some sort of a spaceship

1:19.3

that's going. Using all the Hanukkah gifts, my kids got me out of here. Avi, where are we at

1:24.6

right now? You just have amazing output as normal. You have a bunch of articles. We're going to go over some questions from the audience. And from the members of the channel, you have to be a channel member to ask questions, just a way to give back to my channel members. But tell me, Avi, where are we at right now? What is your latest assessment? And I'm going to show some of the great medium articles that you've been writing.

1:45.3

But where are we at? What have we learned? What questions still remain? So let's start with

1:49.2

what is or was 3i Atlas and where is it right now? Well, thanks for having me. The best

1:56.5

is yet to come because this object, the third interstellar object from outside the system that was

2:03.2

spotted by telescopes passed closest to Earth on December 19th.

...

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