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 November, 2019 campaign!

So far in 2019 citizen scientists from around the world have contributed 9,454 data points! Help us achieve our goal of 15,000 data points this year!

Campaign dates for 2020 have been announced.

Check out the Campaign dates & Constellations for 2019!

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 November 2019 campaign is using the Constellation Pegasus. Check out the dates and constellations for our other campaigns during all 12 months of 2019.

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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 2019 a record year!

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Globe at Night’s “Adopt-a-Street” program

Are you passionate about Dark Skies? Consider coordinating an Adopt-a-Street program in your area during the 2019 Globe at Night campaigns. The Adopt-a-Street program has been selected to be part of the International Astronomical Union’s 100th birthday celebration in 2019 under the framework of the IAU100 Global Project “Dark Skies for All”.

What is the Adopt-a-Street Program?
Globe at Night offers a “Call to Action” for those who want to take more measurements during the campaigns. Children and adults can “Adopt a Street” in their town to take visual and possibly sky-brightness meter measurements during the Globe at Night campaigns. The strategy is for people to adopt a different major or semi-major street and take measurements every mile or so for the length of the street (or for as long as they can). The grid of measurements will canvas the town, allowing for research later in comparison to wildlife, health, energy consumption and cost, among other things.

Sign up to be an Adopt-a-Street coordinator for your city!

Turn on the Night: A Light and the Environment STEM Kit

New! A light pollution education kit: Turn on the Night!

Based on the Quality Lighting Teaching Kit developed by the National Optical Astronomy Observatory for the International Year of Light, 2015, Turn on the Night, a Light and the Environment STEM Kit is available now at Laser Classroom.

Four hands-on activities invite students in grades 7-12 to plan, design and create strategies for city lighting that balance the competing concerns of humans and the environment. Using the problem solving process, students learn about issues raised by human created lighting: Glare, Sky Glow, Light Trespass and Excess Energy Consumption. Come find out more at: https://mailchi.mp/laserclassroom.com/turnonthenight.


Globe at Night and SciStarter

Globe at Night is proud to be one of SciStarter's Top Ten Projects of 2018! 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.

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.