Uranometria

Place the stars. Chart the sky. Uncover a two-hundred-year-old celestial atlas, one solved puzzle at a time.

Uranometria is a quiet logic puzzle in the Star Battle tradition, wrapped in the look of a hand-engraved nineteenth-century star chart. Each board is a grid of irregular regions waiting for its stars.

THE RULES ARE SIMPLE
• Place the right number of stars in every row, every column, and every region.
• No two stars may touch — not even diagonally.
From those two rules alone, every sky has exactly one solution. No guessing — only careful sight.

EVERY SOLVED SKY REVEALS ITS CARD
The constellations aren't decoration. Solve a board and its stars glide into place on the matching plate from Urania's Mirror (1824) — Leo, Cygnus, Orion, Pegasus and dozens more, hand-tinted and named. Your finished puzzles fill an atlas you can pan and zoom.

A NEW SKY EVERY DAY
Six daily puzzles — one for each tier of difficulty, from first light to the deep void — shared by every player. See how many have charted today's sky, and the average and best solve times.

MADE TO BE CALM
• A day view on warm vellum, and a luminous night view of the deep sky — switch anytime.
• Graduated hints that teach the reasoning rather than hand you the answer.
• A gentle "maybe" mark for testing a move before you commit.
• No ads. No purchases. No account. Plays fully offline.

Pull up a chair and chart the heavens.

Recent changes:
Initial release for open testing