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 180,000 measurements have been contributed from people in 180 countries over the last 12 years, making Globe at Night the most successful light pollution awareness campaign to date!

Explore the last 12 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 2019

For 2018 we are collecting your observations during all 12 months of the year! See the dates below and plan to get involved.

2018 Results Summary

Global map plotting all the data points from the 2018 Globe at Night campaigns

The Preliminary 2018 Results are in: there were just over 8,000 data points submitted from 61 countries and 49 US States. Explore the 2018 data in our interactive infographic.