Original eight-observation coronagraph puzzle: place dark masks over stellar cores while keeping illustrated exoplanets clear. Mouse, touch, keyboard, guides, scoring and local saves. Inspired by Roman commissioning. GitHub scientific reference only (no runtime code): https://github.com/spacetelescope/poppy (BSD-3-Clause, 281 observed stars). Original game code MIT. Metadata tags: github-source, game.

umbra-observatory.skillsafe.ai

Run app here

PricingCompletely free

Security scanClean — skill and frontend scanned

Source spacetelescope/poppy

Created2026-11-02

Updated2026-11-02

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