Spend a bounded observing budget on dates to identify the start and end of a real computed retrograde interval from planetary longitude measurements. A local browser science challenge with reset, varied missions and generated art. Source: https://github.com/cosinekitty/astronomy (MIT). Metadata tags: github-source, game.

retrograde-observation-desk.skillsafe.ai

Run app here

PricingCompletely free

Security scanClean — skill and frontend scanned

Source cosinekitty/astronomy

Created2026-10-30

Updated2026-10-30

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