Stories
Short, honest explanations of the sky
Each story notices something ordinary, invites a prediction, then reveals the real mechanism — and closes with a handoff to the live instrument computing your own sky right now. Every number shown is computed from real astronomy, and every historical claim is listed with its sources.
The Sky Was the First Clock
An interactive history of timekeeping, from a stick's shadow to the caesium atom. Build a shadow clock, tally the Moon, watch a calendar drift out of its seasons, and find your longitude from a carried clock — all computed from real astronomy, live.
About 18–26 minutesPlanned
- Planned
Why the Stars Wander
Retrograde motion, reference frames, and why the planets seem to loop backward.
- Planned
The Same Sky, Two Horizons
What it really means to share a sky with someone on the other side of the world.