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 to a website from a computer or smart phone. It's easy to get involved - just follow these 5 Simple Steps!

Image courtesy Babak A. Tafreshi

Join us for the April, 2015 campaign!

Citizen scientists from around the world have contributed 8,382 data points so far this year - thank you! Read more in our Globe at Night Newsletter.

Campaign dates for 2015

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 2015.

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Globe at Night in the News!

Globe at Night webapp

The April 2015 campaign is coming soon! Whether you use a smartphone, tablet or computer, you can submit your data in real time with our webapp - available in 28 languages for 2015! Help us get 2015 off to a great start!

Did you know?

That about ⅓ of Globe at Night data was submitted with a mobile device in 2014? Our partnership with the makers of two mobile apps has greatly boosted the mobile numbers, but even without those data points, the number of people using the web app with a mobile device continues to climb each year. Find out more interesting information about this year's campaigns from our new Globe at Night Interactive Infographic!

Resources for 2015

Globe at Night is truly an international campaign. Our Activity Guides, Postcards, and the data reporting webapp have been translated into many languages. These are all available to download from our Resources page.

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 has been updated with improved feedback, more customization options, more accurate measurements, and more. And now it is available for iPhones! And if you have an iPhone 4S or later, take a look at the Dark Sky Meter app.

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.