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Andrew J. Steinmetz

@ajsteinmetz.com
1.7K followers 1.2K following 868 posts

Physics Ph.D., Academic Professional at #GeorgiaTech, and #UniversityOfArizona alumnus. I love ⚛️ physics, 🌌 astronomy and all 🧪 sciences! (views my own) ajsteinmetz.github.io

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Andrew J. Steinmetz @ajsteinmetz.com · 16h
For one reason or another, I stumbled upon this book and I'm happy that it exists. They really make a CRC Handbook for everything. doi.org/10.1201/9781... #Birds #Science
CRC Handbook of Avian Body Masses screenshot.
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Andrew J. Steinmetz @ajsteinmetz.com · 26/09/2026
My thanks to the #GeorgiaTech Montgomery Machine Mall (www.me.gatech.edu/montgomery-m...) for giving a tour to new #GT1000 #Physics students and showing them all the equipment (mills, lathes, CNC machines, etc) that they could be trained on to build and design for projects and experiments. #EduSky
Students on a tour of a machine shop.
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Andrew J. Steinmetz @ajsteinmetz.com · 24/09/2026
Guess I ain't buying a house anytime soon. www.nytimes.com/2026/09/24/b...
nytimes.com
Mortgage Rates Hit 7% as Iran War Fallout Crushes a Weak Housing Market (Gift Article)
The average rate on a 30-year mortgage in the United States jumped to 7.03 percent, putting pressure on housing affordability.
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Andrew J. Steinmetz @ajsteinmetz.com · 21/09/2026
I know it's a marketing stunt, but golly, it's too darn cute. #Space
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Andrew J. Steinmetz @ajsteinmetz.com · 15/09/2026
Yikes. #Science #AcademicSky #Physics #EduSky #GRFP #NSF www.aip.org/fyi/nsf-grad...
aip.org
NSF Graduate Research Fellowships Expected to Fall Next Year
The program solicitation estimates a sharp decline in awards for 2027 despite recent signals of support from the White House.
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Andrew J. Steinmetz @ajsteinmetz.com · 13/09/2026
I missed out on this newly discovered #Spinosaurus mirabilis from this paper in #Science in February. This animal has me an amazing crest/horn on it's head. So cool. #Dinosaurs #AcademicSky #Fossils #PaleoSky www.science.org/doi/10.1126/...
science.org
Scimitar-crested Spinosaurus species from the Sahara caps stepwise spinosaurid radiation
We describe a close relative of Spinosaurus aegyptiacus, the sail-backed, fish-eating giant from nearshore deposits of northern Africa. Spinosaurus mirabilis sp. nov., discovered in the central Sahara...
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Andrew J. Steinmetz @ajsteinmetz.com · 13/09/2026
I had fun at the Provost's Welcome Dinner for New Faculty with my wife Sandy at #GeorgiaTech last Wednesday. Met a lot of new faculty and acquaintances. #Atlanta
Portrait of two people in front of Georgia Tech wallpaper.
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Andrew J. Steinmetz @ajsteinmetz.com · 09/09/2026
See comments by Terrence Tao: mathstodon.xyz/@tao/1172078...
mathstodon.xyz
Terence Tao (@tao@mathstodon.xyz)
A concrete example of how AI advances in solving key open problems could inihibit the future development of a mathematical field can be found in the global regularity problem for the incompressible Na...
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Andrew J. Steinmetz @ajsteinmetz.com · 08/09/2026
#MathSky
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Andrew J. Steinmetz @ajsteinmetz.com · 08/09/2026
It's in the news that #OpenAI solved the Navier-Stokes Millennium problem, but everyone should read cims.nyu.edu/~tristanb/st... by another team who were working alongside a similar solution strategy. Terrible situation which sours what should be an exciting moment. #Math #Science #AcademicSky #AI
cims.nyu.edu
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Andrew J. Steinmetz @ajsteinmetz.com · 03/09/2026
Thanks lol. There's a very similar figure in link.springer.com/article/10.1... (and in fact, we pulled much of the data from their compilation) but wanted to demonstrate the illusive nature of fusion predictions a little differently.
link.springer.com
How Many Years Away is Fusion Energy? A Review - Journal of Fusion Energy
Journal of Fusion Energy -
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Andrew J. Steinmetz @ajsteinmetz.com · 03/09/2026
New #arXiv preprint! I very much enjoyed making some of the figures for this paper about different #nuclear #fusion processes. Here's the CNO "bicycle", responsible for ~2% of solar energy, with branching at solar core temperatures. #Science #AcademicSky #Physics #Astronomy arxiv.org/abs/2609.01366
The carbon-nitrogen-oxygen (CNO) “bicycle,” showing the catalytic hydrogen-burning cycles CNO-I (yellow) and CNO-II (green).
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Andrew J. Steinmetz @ajsteinmetz.com · 01/09/2026
Honestly it was the universe's one magnetic monopole coming back to have a go at us and mess with our minds.
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Andrew J. Steinmetz @ajsteinmetz.com · 31/08/2026
Our department is hiring! We're a pretty nice place if I do say so myself. #Science #Physics #AcademicSky #AcademicJobs #GeorgiaTech #GaTech #AI #MachineLearning www.physicsworldjobs.com/job/32794/op...
physicsworldjobs.com
Open-Rank, Tenured/Tenure Track Position in Physics - Artificial Intelligence/Machine Learning - Atlanta, Georgia, US job with Georgia Institute of Technology - School of Physics | 32794
Open-rank tenured/tenure-track faculty position at the interface between machine learning and physics.
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Reposted by Andrew J. Steinmetz
Brett Morris @brettmorr.is · 30/08/2026
Baby photo of our now grown up spacecraft:
Smiling nerd in front of the incomplete Roman Space Telescope at NASA Goddard.
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Andrew J. Steinmetz @ajsteinmetz.com · 14/08/2026
Amazing potential measurement of vacuum birefringence, which is a prediction that strong EM fields can polarize light in the vacuum. #Science #Physics #Astronomy www.nature.com/articles/s41...
nature.com
Vacuum birefringence and the polarized X-ray emission from a radio magnetar - Nature
Polarization measurements of the magnetar 1E 1547.0−5408 provide strong evidence that vacuum birefringence shapes X-ray propagation, offering an important observational test of quantum electrodynamics...
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Reposted by Andrew J. Steinmetz
Prof. Sam Lawler @sundogplanets.mastodon.social.ap.brid.gy · 22/07/2026
Science communication pro-tip I learned from setting up my telescope+solar filter on the sidewalk outside the library in a nearby small town this afternoon: you get much more positive reaction from asking "Do you want to look at sunspots?" than "Do you want to look at the Sun?" Also, everybody […]
mastodon.social
Original post on mastodon.social
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Andrew J. Steinmetz @ajsteinmetz.com · 19/07/2026
Congratulations #Spain!!! Well deserved. #WorldCup #Soccer
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Andrew J. Steinmetz @ajsteinmetz.com · 12/07/2026
This semifinal is going to be amazing. Sad to see #Norway go though. #WorldCup #Soccer www.nytimes.com/athletic/liv...
nytimes.com
Argentina 3-1 Switzerland
Argentina struck twice late in extra time to beat 10-man Switzerland in the final quarter-final of the 2026 World Cup.Switzerland forced the game into extra time despite being reduced to 10 men in the...
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Andrew J. Steinmetz @ajsteinmetz.com · 07/07/2026
#Belgium deserves the win after the recent shenanigans. Sad for #USMNT. My team loyalty transfers to #Norway. #WorldCup #Soccer www.nytimes.com/interactive/...
nytimes.com
World Cup 2026: See How a Series of U.S. Mistakes Led to Belgium’s Third Goal (Gift Article)
View in 3-D how the U.S. men’s soccer team failed to stop Belgium from scoring a crucial goal in a match that ultimately knocked the United States out of the World Cup.
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Andrew J. Steinmetz @ajsteinmetz.com · 06/07/2026
Look, I think the Balogun red card was dumb, but the overturn smells so dirty. #Belgium has every right to be furious. Maybe #UEFA should consider leaving #FIFA. I'd rather #USMNT wins cleanly without Trump's thumb on the scale. Ridiculous. #WorldCup #Soccer www.uefa.com/news-media/n...
uefa.com
UEFA statement on the Balogun case
Statement on decision related to Folarin Balogun
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Andrew J. Steinmetz @ajsteinmetz.com · 04/07/2026
I was struggling to find a good post for #July4th, but then stumbled on DSCOVR and thought it was perfect. Happy #America250 #Science #Space
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Andrew J. Steinmetz @ajsteinmetz.com · 04/07/2026
Congratulations Phil!
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Andrew J. Steinmetz @ajsteinmetz.com · 04/07/2026
Absolute respect to #CapeVerde for a world class showing against #Argentina. Best game of the #WorldCup so far. #Soccer
nytimes.com
Argentina beat Cape Verde 3-2
Argentina saw off a spirited Cape Verde side in one of the most incredible World Cup knockout matches in recent memory.Cristian Romero and Lisandro Martinez struck in extra time for Argentina, either ...
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Andrew J. Steinmetz @ajsteinmetz.com · 02/07/2026
#WorldCup is my #USA250 celebration.
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Andrew J. Steinmetz @ajsteinmetz.com · 02/07/2026
I love Pochettino and #USMNT #USA That was a tough game and they did it. Congratulations! #WorldCup (VAR can suck it)
Screenshot of World Cup victory score.
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Andrew J. Steinmetz @ajsteinmetz.com · 30/06/2026
Should have been 9-0. "Send these, the homeless, tempest-tost to me, I lift my lamp beside the golden door!"
nytimes.com
Live Updates: Supreme Court Upholds Birthright Citizenship
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Andrew J. Steinmetz @ajsteinmetz.com · 26/06/2026
Watching #Norway vs #France at the #FIFAFanFest in #Atlanta!
Portrait of two people Crowd watching soccer Fifa fan fest sign
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Reposted by Andrew J. Steinmetz
Corey S. Powell @coreyspowell.bsky.social · 23/06/2026
Comet 3I/ATLAS, the interstellar visitor that blew through our solar system, might have been a truly ancient relic. A new analysis of its unusual composition suggests the comet could be up to 12 billion years old, dating from the earliest era of our galaxy. 🧪🔭 esawebb.org/news/weic2613/
Measurements of specific element varieties by Webb’s NIRSpec (Near-Infrared Spectrograph) instrument show how different the interstellar comet 3I/ATLAS is from comets originating in our own Solar System. Researchers used NIRSpec to measure carbon-13, which contains an extra neutron, relative to the more common carbon-12. They also measured the abundance of heavy hydrogen, which is a hydrogen atom with an added neutron.

Webb’s NIRSpec found a surprisingly large amount of heavy hydrogen, with a low abundance of carbon-13, indicating that 3I/ATLAS came from a place very different from our own Solar System. Researchers say early analysis of these results indicates that 3I/ATLAS was ejected from its origin system billions of years ago.
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Andrew J. Steinmetz @ajsteinmetz.com · 21/06/2026
Even now as we drown in the dark, and my heart is buried underneath the weight ... God, I swear even now I CAN STILL FEEL THE SUN ON MY FACE #Protomen #ActIII Part 2 #Music #RockOpera
reddit.com
From the Protomen community on Reddit: New ARG code dropped, here is the decoded message
Explore this post and more from the Protomen community
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Reposted by Andrew J. Steinmetz
Douglas Reyes-CeroÑ @dreyesceron.bsky.social · 21/06/2026
At this point, this is what Japan is doing to Tunisia
static.klipy.com
Godzilla Monster Leap
Alt: Godzilla Monster Leap sliding on his tail
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Andrew J. Steinmetz @ajsteinmetz.com · 21/06/2026
Add #Curaçao to that list!
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Andrew J. Steinmetz @ajsteinmetz.com · 20/06/2026
Good job #Germany winning that game.
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Andrew J. Steinmetz @ajsteinmetz.com · 20/06/2026
Give me a DR Congo, Ivory Coast, Cape Verde round of 16 for the sheer entertainment value. #WorldCup #Soccer
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Andrew J. Steinmetz @ajsteinmetz.com · 20/06/2026
Also eliminated was Haiti by Brazil, but at least they took it like champs. Made solid plays and attempts the entire way through. This game was... not that. Ouch.
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Andrew J. Steinmetz @ajsteinmetz.com · 19/06/2026
Good job #USMNT especially Freeman for 3 WC goals so far! Didn't know y'all switched to playing rugby in the second half lol. Still less chaotic than that 6-0 Canada/Qatar game. #WorldCup #Soccer
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Andrew J. Steinmetz @ajsteinmetz.com · 17/06/2026
The Croatian goalkeeper Livakovic' deserves props for that onslaught of saves he did in like 2 minutes. Great game. #WorldCup #England #Croatia #Soccer
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Andrew J. Steinmetz @ajsteinmetz.com · 14/06/2026
I have a confession: I've kinda become obsessed with making figures in TikZ because I can just straight up code within my LaTeX editor.
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Andrew J. Steinmetz @ajsteinmetz.com · 14/06/2026
I haven't touched Mathematica in a little while preferring matplotlib, but I have a feeling I'll be calling back once my work gets a bit more theoretical rather than numerical.
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Andrew J. Steinmetz @ajsteinmetz.com · 13/06/2026
Watching the #WorldCup at the #DecaturGA watch party! #Soccer #Football
Man with USA scarf smiling.Two people smiling Crowd sitting on a lawn
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Andrew J. Steinmetz @ajsteinmetz.com · 11/06/2026
I had a wonderful time today at the GT 1000 & GT 2000 Instructor Development Conference. Thank you #GeorgiaTech OUESS. I'm looking forward to teaching #GT1000 this upcoming Fall.
A man is smiling in a conference room.
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Andrew J. Steinmetz @ajsteinmetz.com · 30/05/2026
Unintentional recreation lol #Disney #Epcot
V-Day kiss photo next to couple kissing at Epcot park.
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Andrew J. Steinmetz @ajsteinmetz.com · 18/05/2026
I'm moving all my course materials into quarto.org #Quarto and I kind of love it. #Science #EduSky #AcademicSky
quarto.org
Quarto
An open source technical publishing system for creating beautiful articles, websites, blogs, books, slides, and more. Supports Python, R, Julia, and JavaScript.
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Andrew J. Steinmetz @ajsteinmetz.com · 18/05/2026
Btw, he wrote that in 1995. Pretty prescient to me.
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Andrew J. Steinmetz @ajsteinmetz.com · 18/05/2026
... in the slow decay of substantive content in the enormously influential media, the 30 second sound bites (now down to 10 seconds or less), lowest common denominator programming, credulous presentations on pseudoscience and superstition, but especially a kind of celebration of ignorance." (4/4)
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Andrew J. Steinmetz @ajsteinmetz.com · 18/05/2026
when, clutching our crystals and nervously consulting our horoscopes, our critical faculties in decline, unable to distinguish between what feels good and what's true, we slide, almost without noticing, back into superstition and darkness. The dumbing down of American is most evident ..." (3/4)
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Andrew J. Steinmetz @ajsteinmetz.com · 18/05/2026
... when awesome technological powers are in the hands of a very few, and no one representing the public interest can even grasp the issues; when the people have lost the ability to set their own agendas or knowledgeably question those in authority; ... (2/4)
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Andrew J. Steinmetz @ajsteinmetz.com · 18/05/2026
Carl Sagan's The Demon-Haunted World remains eternally relevant: “I have a foreboding of an America in my children's or grandchildren's time -- when the United States is a service and information economy; when nearly all the manufacturing industries have slipped away to other countries; ... (1/4)
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Andrew J. Steinmetz @ajsteinmetz.com · 08/05/2026
And here's an interpolated video of the "sun glint." youtu.be/1MiMigxn69M?...
youtu.be
[4K, 60fps] AI Sharpening & Interpolating Earth photos taken by the NOAA/NASA DSCOVR satellite
YouTube video by CosmicDefect
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Andrew J. Steinmetz @ajsteinmetz.com · 08/05/2026
Here's Hank's video: youtu.be/OdO_g1S_MBU?...
youtu.be
NASA Didn't Even Know!!
YouTube video by Hank Green
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