Centrifugal force on the surface of this rapidly rotating asteroid would be 0.11g outwards! So almost Lunar-level anti-gravity…

NASA Discovers Distant Planet With Conditions That Could Sustain Rocks https://theonion.com/nasa-discovers-distant-planet-with-conditions-that-could-sustain-rocks/

In geopolitics, history keeps repeating itself. Different actors, different victims, but same themes. We seem unable to evolve past law of the jungle rules.

A little 3I/ATLAS update building on @marshall-eubanks.bsky.social's nice RNAAS from last week. Given its non-grav acceleration and the rate at which it's losing mass, you can work out its size. The answer: a diameter around 1 km, very typical for comets. arxiv.org/abs/2512.18341 🔭 🧪

The Eschatian Hypothesis arxiv.org/abs/2512.09970

Heading to gay Paris tomorrow! Let me know your favorite things to do

#CoolWorlds Podcast Episode 28 is out! With Néstor Espinoza, in which we discuss JWST, Exoplanet Atmospheres & Molecule Detection... youtu.be/bZ7Hge0OUTE

The US tax code makes no sense. So if you own and AirBnB-out a second/third/etc home, you get a massive tax break via depreciation + offsetting maintenance/utilities. But you own+live in one house you get none of that. And if you rent it’s even worse. Isn’t this backwards??

Just get on with it already, you coward

Public health warning that I am not interested in your pet theory that you developed with ChatGPT

With more than 6,000 exoplanets discovered, confirming an exomoon would open new questions about how planetary systems form, and maybe even where life could exist. Watch this converation between physicist Brian Greene and astronomer @davidkipping.bsky.social at the World Science Festival

What a defense… #NYT #EpsteinFiles

The rise of “hyper-authorship” has neutered the correlation of publication metrics vs academic accolades. “The mean # of coauthors per pub, averaged across highly cited physicists, was 121 in 2004. It rose to 952 in 2019, with 10% of the scientists having >2,441 coauthors per pub on average”.

Some poor civilizations probably live in Bootes Void and think the universe must be playing a cruel joke on them.

If 3I/ATLAS is an alien Trojan horse, then why would there be any anomalies at all? Surely they could dress it up to be identical to our typical comets.

I've summarized the truth about Loeb's 10 "anomalies" about 3I/ATLAS in one post. Thanks to @deschscoveries.bsky.social @michael-w-busch.bsky.social @cometary.org and @marshall-eubanks.bsky.social for contributing their expertise!

Dr Ben Cassese (from yesterday!)

“What I’m saying is that we need to consider the possibility it’s aliens.” “Sir, this is a Walmart please stop harassing customers.”

New #CoolWorlds podcast episode just dropped with Jason Steffen, exoplanet scientist, author of "Hidden in the Heavens" and inventor of the "Steffen Perfect" technique for boarding planes! youtu.be/vaqgPzT8PXA

By this point in the year, even the Sun is like “fuck it”

So Avi has been arguing 3I/ATLAS is weird, and a common rebuttal has been “weird compared to what?” - as in we only have 2 other ISOs to compare to. But an interesting thought is that if Oort clouds mix during stellar encounters, many of our comets may in fact already be ISOs in origin.

I’ve been thinking a lot about SSA vs SIA in anthropics lately. Which one do you favor? Let me hear your hot takes.

New video! Why We Might Live in a "Barely Habitable" Universe youtu.be/Hj7a4mPkbsY

statistically, we likely live on one of the planets with the highest population of observers in the universe

So who has read AI 2027 and what was your reaction?

I’d have a lot more respect for Republicans if they responded to the protests with whatever their argument is for authoritarianism. Instead, they don’t address the concerns of the protestors at all and just try to delegitimize their views through ad hominems, call them Hamas/Marxists/radicals/etc.

Contemplating existence in Amsterdam

this was a lovely episode

“Carl… Carl…”

#26 Will Kinney - Before the Big Bang, Inflation, Infinity of Worlds youtu.be/HSZtn0yKPBI

Oh my God this made my day…

Quel surpris! As I suspected, the Navcam “cyclinder” image bombarding social media, and subject to Avi’s last blog post, is not 3I/ATLAS, it’s Phobos.

Lastly, that bright streak in the Navcam images is actually Phobos. See below for a short analysis of this image. It's very sad that NASA isn't able to put the record straight with the current political chaos. bsky.app/profile/stim...

If we get through this, I predict that we’re going to look back at these days with confusion. How did anyone go along with all that? It will feel like a terrible and confusing nightmare, one we can hardly believe took hold as firmly as it did.

3I/ATLAS, a quick update. Be sure to follow @stim3on.bsky.social

Stunning if confirmed…

Do cats also think that aliens will look like them?

Here’s my new paper which our last #CoolWorlds video discussed. Paper tackles two existential puzzles: why don’t we live around the most common star type, an M-dwarf, and, why do we live so early in cosmic chronology? arxiv.org/abs/2510.01215

I have been in the UK a couple of months now. Perhaps I was naive but I’m shocked how universal hate-fueled politics has become. I want to live somewhere that values compassion, tolerance and treating others with dignity. How did these messages of hate gain so much traction?

“If an explanation could easily explain anything, then it actually explains nothing. When theories are variable, experimental testing is useless. I call such theories bad explanations. Being proved wrong by experiment and changing to other bad explanations does not get one jot closer to the truth.”

New studies used JWST to probe TRAPPIST-1e, the most accessible potential Earth-like exoplanet. Data reveals the atmosphere is 1) Not hydrogen dominated (unsurprising)😌 2) Unlikely to be Venus-like🧐 3) Compatible with N2-rich😎 arxiv.org/abs/2509.05407 arxiv.org/abs/2509.05414

#CoolWorlds Podcast Episode 25 just dropped with PBSSpaceTime's very own Matt O'Dowd youtu.be/V7QjrsadlKQ

“It is fundamentally impossible to ever establish alien life at some threshold odds ratio, Ocrit, unless we deem the prior probability that some as-yet-undiscovered natural process could explain the event is less than 1/(1+Ocrit).” iopscience.iop.org/article/10.3...

In a culture that promotes the individual, we are comprised of various axes of identity, such as political ideology, nationality, race, even football team. I think it’s important to question in our modern society whether those differences are causes for celebration - or are wedges of division.

The biggest tip I have for scientists getting started in outreach is you have remember you’re speaking to the layperson, not your peers. It’s incredibly hard to get their imaginary gaze out of your head, but it makes you overly nervous, formal and distant if you try to do outreach for them.