My latest comments

  • Image Credit This article (below) is about classical analogs of quantum models. It uses an unqualified characterization of electrons as "microscopic particles." With derivative wave-like phenomena. An electron, which is a particle that moves in an atom or in a […]
  • Long-term space missions pose long-term mental health issues. • Space.com > "Watch trailer for 'Space: The Longest Goodbye,' new film exploring astronaut mental health (video)" by Jeff Spry (February 18, 2024) – Follow a NASA psychologist as he trains future deep-space […]
  • The immune system, hippocampus, neurotransmitter system, stress management, … the microbiota gut-brain axis. This article even mentions the film The Martian. • Space.com > "Space travel taxes astronauts' brains. But microbes on the menu could help in unexpected ways" by […]
  • Dome master down-sampled to 2k, 180 degree view, monoscopic. Meant to be viewed in a full-dome digital planetarium. … Shows the evolution of the universe from shortly after the Big Bang to the present day, in gas […]
  • Illustration by Koji Arai, Caltech Thinking like a physicist … When is a burger like a layered stack of spheres? Thinking in 3D and spherical coordinates. • Caltech Magazine > Fall 2023 > "Building a Burger with Math" by Whitney […]
  • Forget visualizations of "particles," no matter how small, moving apart from some medium. This article by Paul Sutter … got me imagining a 4D wave function of interacting fields and wavepackets … interfere, constructively and not … so that dynamic […]
  • Antigravity? Regarding a "force-less" physics and the notion of gravitational "charge," if gravity really is about spacetime geometry (topology), is an "anti" (repulsive) geometry possible? I really can't visualize 4D (or higher) geometry anyway. And anti-matter (as noted in this […]
  • Regarding my theme of what's changed in the last 50 – 100 years in mathematical physics … Modeling the profile of spacetime: A question of the scalar curvature of three-dimensional spaces with steadily decreasing amounts and concentrations of energy-mass. Thinking […]
  • This recent Science Asylum video is an excellent overview of how the cosmic distance ladder evolved. • YouTube > The Science Asylum > "We Can't Measure* Distance In Outer Space!" (October 30, 2023) We can't measure the distance to astronomical […]
  • How many stars are there in the universe? How many black holes? Who cares? … what confidence is there in any estimate anyway? Well, The Dark Energy Survey explores this matter. • Big Think > "There are 40 quintillion black […]