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Ground Truth · live sky · every position recomputed in your browser

The Sky Above You

Name any place on Earth and look up. The Sun, the Moon and the five naked-eye planets in the sky over that place — right now, or at any moment you choose — every position recomputed live from the canonical astronomical algorithms. Nothing is fetched, nothing is generated; the formulas all sit in one file beside this page, and they were checked against JPL Horizons before it shipped.

Name a place, or pick one below.
the sky remembers who looked · the collective map

Anyone who looks up from a place can leave a mark — a wordless, nameless record that someone looked up here. This map is every mark ever left, on this page and on the sibling ground page, drawn live from the shared archive. A mark stores a 0.1° cell, a kind, and a count — nothing else, and nothing about you.

looked up at the skydrilled the ground
reading the archive…
surface back into the deep ground
The Ground Beneath You ↓ — the sibling ritual, drilling DOWN through the rock under that same patch of Earth. The Sun's Crooked Clock — why the shortest day and the earliest sunset aren't the same day. The Farthest Point — the Earth's true shape, re-derived from primary geodetic data. The whole Wasteland — a ground of strata you scroll down through, newest on top. This is one of them.