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Review star brightness charts, spot moving asteroids, and tag Mars imagery in short beginner-friendly missions. Play in minutes. Learn as you go. Create an account only if you want to save streaks and progress.
Time
About 5 minutes
Experience
No science background needed
Today's set
Active Survey
Play instantly
Open today's mission and begin immediately. Sign up later if you want streaks, rewards, and saved history.
Learn fast
The game explains what to look for before you answer, so first-time players aren't dropped into unexplained jargon.
Contribute something real
The missions are based on real astronomy workflows, packaged into a format that feels approachable instead of academic.
Step 1
Each puzzle starts with a plain-language explanation of the signal or surface feature you're trying to spot.
Step 2
Annotate the chart or image, submit your answer, and move through the mission set without getting lost in setup screens.
Step 3
Fresh daily missions keep the loop tight. Accounts unlock saved progress, badges, and discussion after you submit.