Globe at Night is an international citizen-science campaign to raise public awareness of the impact of light pollution by inviting citizen-scientists to measure & submit their night sky brightness observations. It's easy to get involved - all you need is computer or smart phone & follow these 5 Simple Steps!

Image courtesy Babak A. Tafreshi

Join us for the February, 2016 campaign!

Citizen scientists from around the world contributed 22,771 data points in 2015 - thank you! This year we are up to 2,555 data points!

Campaign dates & Constellations for 2016!

Can you find Orion?

Orion looks very much like a person. First, you should spot Orion’s Belt, which is made of three bright stars in a straight line. One of Orion’s legs is represented by the bright star Rigel, one of the brightest stars in the night sky. His two shoulders are made of the stars Bellatrix and Betelgeuse. You can see Betelgeuse’s reddish color without a telescope.

Practice finding all the Globe at Night Constellations or review the Magnitude Charts.

The current campaign is using the Constellation Orion. Check out the dates and constellations for our other campaigns during all 12 months of 2016.

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Globe at Night in the News!

Globe at Night webapp

The February 2016 campaign is here! Whether you use a smartphone, tablet or computer, you can submit your data in real time with our webapp - now available in 28 languages! Thanks for making 2015 a record year!


Ever wonder what happens to your Globe at Night measurements? Scientists and citizen-scientists are using them in a variety of projects, most of which need multiple data points at the same location over time. This map shows 5,000 locations on Earth where an observation has been made but there hasn’t been a new one in the last five years. Do you or a friend live near one of these points? Help us out by making an observation there! And while you are at it, take a measurement where none have been taken yet! (See the map for 2015 and zoom in to your location to see where data was taken in 2015.)

Did you know?

That citizen scientists in 104 countries participated in Globe at Night in 2015? And they submitted their data in 23 different languages (other than English)! Find out more interesting information about this year's campaigns from the Globe at Night Interactive Infographic for 2016!

Related phone apps

Globe at Night is pleased that two native smartphone apps have become available that integrate well with our campaigns. The Loss of the Night app is available for Android & iPhones. And if you have an iPhone 4S or later, take a look at the IYL version of the Dark Sky Meter app. Both are free downloads!

See how your region is doing in 2015 below. If you don't see very many data points, consider going outside tonight and contributing your own! Compare to other regions or previous years with our regional map generator.