Measure Light Pollution
Globe at Night asks you to step outside, count how many stars you can see in a constellation, and report it to map light pollution worldwide. It takes just a few minutes on a clear night and needs no equipment. Your observations help scientists and cities understand and reduce the loss of dark skies.
When
Ongoing — start anytime
Duration
A few min
Where
🌐 Online — join from anywhere
Min age
13+
Hosted by
Globe at Night
Reviews
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Example of a helpful review
A VolunteerVault volunteer
ExampleSep 20, 2026
“Loved this one — the organizer had everything set up before we arrived and explained exactly what we'd be doing. It ran about 30 minutes long, which caught a few of us off guard, so plan for that. Would definitely come back.”
💡 Bring closed-toe shoes and a water bottle — it gets warm.