Martyn Greville‑Giddings
Things I make in my spare time. Each is free to use, and its source is on GitHub.
Tonight
Today's positions, seen from the north, so the planets travel anticlockwise. Distances are on a log scale. Worked out in your browser with the orrery's own code.
Orrery
The solar system on any date, computed from JPL's orbital elements. Tilt it into three dimensions, follow a planet through its retrograde loop, or switch to the sky guide to see what is up tonight, with moon phases, star charts and eclipses to 2035.
greville-giddings.me/orrery
Field Guide to Figure Skating
A reference to figure skating elements and the national tests they appear in. Edges, turns, spins and jumps are drawn as diagrams of where the blade and the body go.
figureskating.guide