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 Tafreshi

Join us for the December, 2017 campaign!

So far in 2017 citizen scientists from around the world have contributed 15,232 data points! Help us achieve our goal of over 15,000 data points by year’s end!

Campaign dates for 2018 have been announced! Check them out and make plans for how you will participate next year.

Can You Find Pegasus?

Pegasus, the winged horse ridden by Perseus to rescue Andromeda from the sea monster Cetus is easiest to find during Autumn. The easiest way to find Pegasus is to look overhead and find the great square of Pegasus found adjacent to the milky way. This great square is the body of Pegasus and the body and head extend outwards.

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

The current campaign is using the Constellation Pegasus. Check out the dates and constellations for our other campaigns during all 12 months of 2017.

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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 2017 a record year!

Calling all Girl Scouts!

SciStarter and Girl Scouts of the USA are teaming up with Globe at Night and six other citizen science projects to encourage girls to pursue STEM (science, technology, engineering, and math) by adding 23 new badges through the new “Think Like a Citizen Scientist” program.

Globe at Night & STARS4ALL

Globe at Night has been accepted as part of the STARS4ALL Light Pollution Initiatives.

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 (iPhones an iPads). And if you have an iPhone 4S or later, take a look at the Dark Sky Meter app, just 99¢ in the App Store.

Globe at Night article in Science Scope

Every month the National Science Teachers Association (NSTA) Science Scope journal (for middle school science teachers) features one citizen science project that is an excellent fit for the middle school science classroom. The July 2017 NSTA Science Scope issue features Globe at Night! Download it as a PDF to read it.

Did you know?

Citizen scientists in 97 countries participated in Globe at Night, submitting their data in 18 different languages (other than English) in 2016! Find out more interesting information about this year’s campaigns from the Globe at Night Interactive Infographic for 2017!

Globe at Night and SciStarter

SciStarter has been working closely with Globe at Night to integrate some of their new NSF-funded SciStarter 2.0 tools onto their site. These tools allow participants to automatically track their contributions through a centralized SciStarter dashboard. Check out our project page to learn more.

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.