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Photo: DDQ
Participation fee $0
Expenses $0
Spend the time outdoors
Location anywhere
Appropriate for kids yes
Teaching materials yes


Required Gear:

An iPhone 4S or higher.


Dark Sky Meter


Help scientists measure, understand effects of light pollution.
Use free app to measure "skyglow" in real time.

The Dark Sky Meter (available for iPhones) allows citizen scientists to contribute to a global map of nighttime light pollution. Light pollution is a growing problem in urban environments, but now you can help scientists better understand its effects on the environment. The map is also a great help for (amateur) astronomers looking for dark skies. By utilizing the camera built in to your iPhone, the Dark Sky Meter actually measures ‘skyglow’ and updates the data in real time.

The lite version is free and gives you a rough estimate of the night sky brightness.

The Pro version of the app also charts weather conditions and cloud cover so you can take readings at optimal times. The app is as easy to use as taking a picture, and is a fun way to learn about your night sky.

The Results are live and visible for everyone on a global light pollution map generated by the app users. Visit darkskymeter.com to see the map.




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