Andrew J. Steinmetz

@ajsteinmetz.com

1741 Followers 1243 Following

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

Screenshot of World Cup victory score.
Portrait of two people
Man with USA scarf smiling.
A man is smiling in a conference room.
V-Day kiss photo next to couple kissing at Epcot park.
Ransom note by hacker group.
Underside of fall oak tree in the forest.
The parachutes of the integrity space module are deployed.
A crowd gathers to look through a computer screen connected to a small telescope pointed at the stars.
Nasa
Black dress shoes.
Two newlyweds stand on the steps in front of a church.
"Once sliding starts, these low-energy zones act like cold-welded spots causing plastic deformation in their vicinity, strengthening these surrounding areas but weakening the originally cold-welded site. In this way, old low-energy zones disappear, while new ones arise as sliding progresses."
illustration by John DeLucca and design by Caspar Newbolt
Art for "The Good Doctor Part 2"
A Hubble Space Telescope image of the core of quasar 3C 273. A coronagraph on Hubble blocks out the glare coming from the supermassive black hole at the heart of the quasar. This allows astronomers to see unprecedented details near the black hole such as weird filaments, lobes, and a mysterious L-shaped structure, probably caused by small galaxies being devoured by the black hole. Located 2.5 billion light-years away, 3C 273 is the first quasar (quasi-stellar object) ever discovered, in 1963. NASA, ESA, Bin Ren (Université Côte d’Azur/CNRS) John Bahcall (IAS)
John DeLucca on illustration and Caspar Newbolt on design.
Art by John DeLucca and design by Caspar Newbolt.
Cover of the 2023 Plasma Formulary book by the Naval Research Laboratory.
A page of Fibonacci's Liber Abaci from the Biblioteca Nazionale di Firenze showing (in box on right) 13 entries of the Fibonacci sequence.
Poster for "This City Made Us" by the Protomen. Art depicts someone walking towards the viewer in books while a figure on a coat walks away. A helmet lies between them.
2024 CD reissue of 1987's Flying Beagle album by Himiko Kikuchi.
Figure 2 from Leitch & Catania 2012. (A) Juvenile alligator head with ISOs highlighted, (B) close‑up scanning‑electron micrograph of a single dome‑shaped ISO, (C) lateral view of the skull showing ISO distribution along the jaws.
A meter showing daily activity on BlueSky for my profile.
(Upper) All-sky picture of the infant universe created from nine years of WMAP data. The image reveals 13.77 billion year old temperature fluctuations (shown as color differences) that correspond to the seeds that grew to become the galaxies. (Lower) WMAP 3-year Power spectrum of CMB compared to recent measurements of BOOMERanG , CBI, VSA and ACBAR.
First peak shows the universe is close to spatially flat. Constraints on the second peak indicate substantial amounts of dark baryons. Third peak will measure the physical density of the dark matter. https://background.uchicago.edu/~whu/intermediate/intermediate.html
A billet of highly enriched uranium that was recovered from scrap processed at the Y-12 National Security Complex Plant. Source: https://en.wikipedia.org/wiki/File:HEUraniumC.jpg
Top antitop quark event diagram.
Top: This is a scale model of a Tyrannosaurus rex exhibit which was planned by the American Museum of Natural History but never executed. Source: Osborn, H.F. 1913. Tyrannosaurus: restoration and model of the skeleton. Bulletin of the American Museum of Natural History 32: 91-92. https://commons.m.wikimedia.org/wiki/File:AMNH_rex_mount.png Bottom: More anatomically accurate modern arrangement AMNH 5027 with corrected skeleton and horizontal body plan. Source: https://commons.m.wikimedia.org/wiki/File:AMNH_5027_Trex.jpg
A drawing of three ancient jawed fishes from the Early Devonian swimming in the ocean. The have several spiny fins and large black eyes.
Cityscape of downtown Tianjin on the river.
Three professors in academic regalia pose for a photo.
A telescopic tube with two cables show a hazy blue stream of electrons illuminating the right side of the class with green light. A shadow is cast by the internal metal Maltese cross. Image Credit: D-Kuru/Wikimedia Commons https://commons.wikimedia.org/wiki/File:Crookes_tube-in_use-lateral_view-standing_cross_prPNr%C2%B011.jpg
Photo of a black/grey rock with a cross-section slice being held by gloved human hand beside a 1 cm ruler for scale. Image credit: Carl Agee, University of New Mexico https://en.wikipedia.org/wiki/File:MarsMeteorite-NWA7034-716969main_black_beauty_full.jpg
A group of cavemen attend a lecture by another caveman who explains the tale of a stegosaurus: "Now this end is called the thagomizer... After the late Thag Simmons." Far Side comic, 1982.
Allosaurus anterior caudal with a partially healed wound congruent with what a Stegosaurus tail-spike puncture would be expected to cause. Centimeter ruler for scale.
The viscosity-entropy ratio for some common substances: helium, nitrogen and water. The ratio is always substantially larger than its value in theories with gravity duals, represented by the horizontal line marked viscosity bound.
Cross section of the Oklo and Okelobondo deposits with the projection of the reactors at their different levels.
Transmission X-ray image of RSES 61-18.8 with graphite indicated. (Inset) Raman spectra for the top inclusion and for an epoxy “inclusion” from another investigated zircon. The broadened “D-band” at ∼1,400 cm−1 indicates disordered graphite (39); C–H stretch bands at ∼2,800–3,100 cm−1 (39) are observed in epoxy but not graphite.
Demonstration of the terminating condition for the hydrogen atom solution.
Domains of interest spanned in the (T/m, Δμ/m=(μ-m)/m)-plane, top for three dimensional and bottom frame for two dimensional systems: Sommerfeld expansion (blue), Boltzmann approximation (lined purple), and the new Theorem 5 domain (dotted green). Solid black contours show the number of particles per de Broglie volume Eq. 1.
Image of vortices in 200 nm thick YBCO film taken by Scanning SQUID Microscopy after field cooling at 6.93 μT to 4 K.
A screenshot showing 1100 AQI levels in Tianjin, China in March, 2024.
Cherry blossom trees in bloom outside the main gate of Hebei University of Technology.