Star Chart — Observer Agreement
Last updated: June 2025
Every observatory operates by a set of shared principles. Star Chart's observer agreement is ours — clear, fair, and anchored in the same respect for the night sky that motivates every astronomer. By looking up, you agree to it.
The observatory
Star Chart is a free, browser-based memory card game. Match celestial body and cosmic pairs, build your star count, and complete the night sky chart. No payment. No account.
All observers welcome
Stargazers of every age are invited under the dome. Star Chart is non-violent, gambling-free, and appropriate for all audiences.
Star score
Points accumulate per matched pair, with a chart multiplier for consecutive successes. Star scores are session-only and carry no real-world monetary value.
No wagering on the stars
Star Chart contains no virtual currency, no loot mechanics, no betting systems, and no randomised prizes of any kind.
Intellectual property
All game assets belong to their creators. Personal play is freely permitted. Commercial reproduction requires prior written consent.
Prohibited conduct
Automated bots, exploit tools, and deliberate disruption of other observers' sessions are strictly prohibited under the dome.
No clear-night guarantee
Star Chart is provided as-is. We hold no liability for indirect losses from gameplay or service outages.
Agreement updates
These terms may be revised. The date above marks the current version. Continued stargazing constitutes acceptance.