[Download 698-page PDF eBook]
Everything You Always Wanted To Know About #Mathematics* (*But didn’t even know to ask)
A Guided Journey Into the World of Abstract Mathematics, Theorems, and the Writing of Proofs: math.cmu.edu/~jmackey/151_12…
Orbital motion of the ISS, visualized by sequentially adding the still frames of my star trails. Seen are stacking golden streaks of city lights and straight-line stars in our orbital direction. A surreal perspective of our Earth!
GPT-5 Pro taking a break in the middle of its chain of thought (in response to a question about non-Abelian Hodge theory) to write a children’s operetta?
Hey look, we sang my parody song about the James Web Space Telescope, and also I released a new version of my text-to-speech-focused Reddit client! angelastic.com/2025/09/26/ja…
Your name goes here!
We’re collecting names to fly around the Moon. 3.4 million of you joined us for Artemis I. How many of you would like to come along with the Artemis II mission? go.nasa.gov/artemisnames
ALT An image of the blue Artemis II boarding pass is shown in the center of the image. The boarding pass says “Your Name Here.” Behind the boarding pass is an image with part of the Orion spacecraft at the bottom left corner and the Moon on the right half of the image. Above Orion reads, “Get your Artemis II boarding pass!” in white text against the black background. Credit: NASA
Oh look, I released a new version of Seddit and published some silly parody lyrics about signal processing for speech synthesis, and oh listen, Joey sang my last parody. angelastic.com/2025/09/02/so…
I released a new macOS/iOS app yesterday! It's so you can listen to Reddit posts and comments hands-free without having to do anything to keep it going. angelastic.com/2025/08/06/se…
Yay, the iOS version of my app Lifetiler was just approved! apps.apple.com/us/app/lifeti…
I also released an update to the macOS version, with a small new feature, some bug fixes, and dark mode, VoiceOver, and performance improvements. 😊
The topological part of my brain
Finds Möbius strips quite a strain.
But I make you this pledge:
I’ll glue one at its edge
And build a real projective plane.
By Richard Elwes
A sounding rocket carrying student experiments is scheduled to launch Thursday, June 26, with a launch window beginning at 5:30 a.m. EDT. Livestream will begin on the Wallops YouTube channel 15 minutes before scheduled launch time. go.nasa.gov/4nf2Ik9
ALT A visibility map showing the mid-Atlantic region. The map shows how many seconds after that people in the area may be able to see the sounding rocket in the sky. The land is green and the ocean is dark blue. Visibility of 30-32 seconds is represented by a purple semi-circle reaching north to New York state, west to West Virginia, and as south as Raleigh, South Carolina. 10-21 seconds is represented by a bright blue semi-circle reaching north to Trenton, New Jersey, west to Charlottesville, North Carolina, and south to parts of South Carolina. Visibility from 0-10 seconds is indicated by a bright green semi-circle mostly covering to the edge of the southern border of Delaware and down into the Eastern Shore of Virginia. On the right is a black box with white words: "Colors indicate when viewers will have line-of-sight access to the vehicle, with 3° elevation or more. Measured in seconds after takeoff."