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 6 Simple Steps!

Image courtesy NSF’s NOIRLab

Join us for the May, 2022 campaign!

We are off to a great start this year with 9,985 observations so far! Help us reach our goal of 20,000 data points for 2022!

Check out the campaign dates & constellations for 2022!

Can you find Bootes?

To find Bootes, look for the Big Dipper constellation in the north. Follow the arc made by the Dipper's handle until you see a bright star. This is Arcturus, which is located in what would be the waist of Bootes. The rest of the stars in Bootes form the shape of a kite, with dimmer stars beneath the diamond shape of the kite forming his legs.

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

The May 2021 campaign is using the Constellation Bootes. Check out the dates and constellations for our other campaigns during all 12 months of 2021.

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How you can make a difference by participating in Globe at Night and why...

Globe at Night webapp

Whether you use a smartphone, tablet or computer, you can submit your data in real time with our webapp - now available in 28 languages! Help us make 2021 a record year!

For Libraries

SciStarter and Arizona State University created a customizable citizen science kit with everything needed for patrons to engage in Globe at Night. Access all the materials and details at SciStarter.org/Library-Resources


Globe at Night and SciStarter

Globe at Night is proud to be one of SciStarter's Top 21 Projects of 2021! Register with SciStarter to take advantage of their tools to automatically track your contributions through a centralized SciStarter dashboard. Check out our project page to learn more.


Resources for 2022

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 is a free app. available for Android & iOS. And if you have an iPhone that can run iOS 10 or later, take a look at the Dark Sky Meter app, just $1.99 in the App Store.

See how your region is doing this year 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.