IAU Global Outreach Project: Dark and Quiet Skies Awareness 

In collaboration with the IAU Dark Skies Ambassadors, Dark Skies for All & B7 – Inter-Division B-C Commission Protection of Existing and Potential Observatory Sites the IAU will raise awareness of dark and quiet skies by endorsing actions during and around the International Day of Light on 16 May 2020. The IAU OAO intends to bring together the IAU Dark Skies Ambassadors as agents of change in crucial topics for dark skies advocacy, such as satellite constellation awareness, and natural right to view the sky, in addition to promoting independent events by astronomy communicators related to dark and quiet skies. 

Register your events on Dark and Quiet Skies Awareness in our Global Outreach Calend and join the Online Astronomy@Home Awards 


Endorsing Globe@Night Campaigns

During May, one of our focal points will be Globe@Night Campaigns, starting on May 14 and running for 10 nights. During this time of confinement, we ask the public to safely look up and take measurements. It is easy to do:

  1. During the campaign dates, go outside more than an hour after sunset (8-10 pm local time). The Moon should not be up. Let your eyes become used to the dark for 10 minutes before your first observation.
  2. Use a night sky app on your phone outside to find the constellation from where you are.
  3. Go to the Globe at Night Report page to start to enter Globe at Night measurements. Make sure you are in “Nighttime version"
  4. With a smart phone, the app will put in the date, time, location (latitude/longitude) automatically. Otherwise please type them in. For your location, type the street address closest to your observation along with the city, state or province and country.
  5. Choose the star chart that looks most closely to what you see toward your constellation. That is, what is the faintest star you can see in the sky and find in the chart?, 
  6. Chose the amount of cloud cover at the time of observation and then click on the “SUBMIT DATA” button. 


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 and submit their night sky brightness observations. You are making a difference by helping to monitor those changes. 

So far in 2020 citizen scientists from around the world have contributed 8,400 data points! Help Globe@Night achieve 15,000 data points this year!

Check out the Campaign dates & Constellations for 2020!

IAU Dark Skies Ambassadors

Become an IAU Dark Skies Ambassador

The IAU Dark Skies Ambassadors is a program that invites keen enthusiasts worldwide to be dark sky advocates. The IAU Dark Skies Ambassadors organise actions in their communities. Joining the program creates a peer-supporting environment and provide visibility of your efforts internationally.

Endorsing Dark Skies Rangers programme 


Dark Skies Rangers is an awareness program aimed at students of all ages to stimulate them to make an audit of light pollution in their cities. Students evaluate the level of light pollution, how much energy is being wasted, and produce a report to be delivered to the local authorities. Along the way, the students also carry light pollution awareness campaigns in their local communities.

Find out more about the "Outdoor Lighting Audit" teachers' guide here

Dark Skies Rangers (DSR) is a joint collaboration between the National Optical Astronomy Observatory of the USA (NOAO) and the Galileo Teacher Training Program (GTTP).

Past Events:  

Celebrate UNESCO's International Day of Light on May 16, 2020

Follow the #IDL2020 Calendar of Events!



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