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 February, 2019 campaign!

So far in 2019 citizen scientists from around the world have contributed 1,621 data points! Help us achieve our goal of 15,000 data points this year!

Check out the Campaign dates & Constellations for 2019!

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 February 2019 campaign is using the Constellation Orion. 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!

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

Turn on the Night

The IAU 100 has made special arrangements to be able to offer a limited number of “Turn on the Night” kits for free or reduced cost based on need.

The kit includes four hands-on STEM 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.

Apply for a FREE or Reduced Cost Kit!

Globe at Night & STARS4ALL

Globe at Night is a member of the STARS4ALL Light Pollution Initiatives.


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 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.

Did you know?

Citizen scientists in 106 countries participated in Globe at Night, submitting their data in 20 different languages (other than English), with 57% of them using a mobile device in 2017! Find out more interesting information about this year’s campaigns from the Globe at Night Interactive Infographic for 2018!

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.