About Globe at Night

The Globe at Night program is an international citizen-science campaign to raise public awareness of the impact of light pollution by inviting citizen-scientists to measure their night sky brightness and submit their observations from a computer or smart phone. Light pollution threatens not only our “right to starlight”, but can affect energy consumption, wildlife and health. More than 100,000 measurements have been contributed from people in 115 countries during the campaigns each winter/spring over the last 9 years, making Globe at Night the most successful light pollution awareness campaign to date!

Explore the last 9 years of data in our interactive data map, or see how your city did with our regional map generator. The Globe at Night website is easy to use, comprehensive and holds an abundance of background information. The database is usable for comparisons with a variety of other databases, like how light pollution affects the foraging habits of bats.

Globe at Night 2017

For 2017 we are collecting your observations during all 12 months of the year! See the dates below and plan to get involved.

2015 Results Summary

Global map plotting all the data points from the 2015 Globe at Night campaigns

The Raw 2015 Results are in: there were 23,040 data points submitted from 104 countries and all 50 US States. Click the image above to view a larger version of the map, or explore the 2015 data in our interactive infographic.