Martyn Greville‑Giddings
Things I make in my spare time. Each is free to use, and its source is on GitHub.
Tonight
The sky over southern England tonight, with north at the top and east on the left. The dotted line is the ecliptic. Tap a planet or the Moon to open it in the orrery, or set your own place in its Tonight panel and this chart will follow it.
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. Tap a planet to open it there.
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