Robert Serrano

Indications Iran was pursuing a nuclear weapon: -Enriched Uranium to 60 percent with 3.7 percent being needed for any civilian usage. -Iran developing Mazio ICBM launched economically unfeasible to put conventional warhead. -Building of significant underground facilities as Isfahanm, Nantz and Fordow. -Violations of the JCPOA agreement, violating IAEA inspections not giving access to certain cites, kicking inspectors off sites. Why would you do all this to not develop a weapon?

In core-collapse supernova, neutrino fast flavor conversion increases (decreases) shock revival & explosion energy for low (high) mass progenitors. PRL: go.aps.org/4nsLkcg PhysMag: go.aps.org/4u5Ygac

Its clear that Iran now sees control of the strait of Hormuz as good as the leverage an nuclear weapon would give it on the international stage...

Richard Feynman reportedly spent long hours, sometimes up to five hours, rehearsing lectures alone in empty classrooms before delivering them. It shows how mastery often looks like effortless clarity, but it is built in private repetition.

It was 🎉 paper day 🎉 a couple of days ago and I forgot I post about it. @itsizzyconnor and I led a study on understanding the Strouhal number from first principles in blast wave driven turbulence (supernova in a galactic disk): arxiv.org/abs/2605.03768

@theapplehub @seangacevic

Tim Cook is officially stepping down as CEO of Apple as of September 1, 2026 🚨 John Ternus will become the new CEO

State of the art numerical simulations predict telltale photon signatures from mergers of supermassive black holes go.aps.org/4dre6Xp

@theapplehub @markgurman @seangacevic

Apple is reportedly making code changes to iOS 27, including removing old code and rewriting features to make the system faster, more responsive, and potentially improve battery life 🚨 Source: @markgurman

Quantum field theory is insane.

#OTD Ten years ago, we published the @LIGO discovery paper Observation of Gravitational Waves from a Binary Black Hole Merger journals.aps.org/prl/abstract/1…

The same goes for a lecture I developed on how to derive macroscopic viscosity (and heat flux) by perturbing the distribution function away from Maxwell-Boltzmann. Take a look if you’re interested astrojames.github.io/lecture-notes/…

Last week I taught a grad. class at UofT on constructing fluid theories from the Boltzmann equation, and finding the amplitudes of the eigenmodes for ideal MHD. I have uploaded my notes to my website, for those who might be interested: astrojames.github.io/lecture-notes/…

We're going back to the age when astronomy was funded by private patrons.

The *most* ab-initio simulations of radiatively efficient accretion flows!

TACC has begun installing Horizon, the NSF’s new Leadership-Class Computing Facility supercomputer. Horizon is being deployed in Round Rock, Texas, and will become the largest academic supercomputer in the U.S. when production begins in 2026. Learn more: ow.ly/ehIk50XBRwg

We should be developing thorium

Living Reviews in Computational Astrophysics — #ReviewArticle update published: Wolfram Schmidt-Brückner. Large eddy simulations in astrophysics. #LivingRevComputAstrophys 11, 2 (2025). doi.org/10.1007/s41115… #OpenAccess

Stunning photograph of the total solar eclipse on July 11, 1991, taken by Antonio Turok in Chiapas, Mexico.

Understand The Universe

Prof. Chen Ning Yang, a world-renowned physicist, Nobel Laureate in Physics, Academician of the Chinese Academy of Sciences, Professor at Tsinghua University, and Honorary Director of the Institute for Advanced Study at Tsinghua University, passed away in Beijing due to illness at the age of 103. His life stands as a timeless chapter in human history—one that shines not only for China but for the global community of thinkers and innovators. His legacy will live on forever.