Welcome to GLOBE at Night project

GLOBE at Night

Less of Our Light for More Star Light. Saving Energy; Saving our Night Skies


With half of the world’s population now living in cities, many urban dwellers have never experienced the wonderment of pristinely dark skies and maybe never will. Light pollution is obscuring people’s long-standing natural heritage to view stars. The GLOBE at Night program is an international citizen-science campaign to raise public awareness of the impact of light pollution by encouraging everyone everywhere to measure local levels of night sky brightness and contribute observations online to a world map. All it takes is a few minutes to participate between 8-10 pm, March 22 through April 6. Your measurements will make a world of difference. Read More...


How to participate

Five Easy Star-Hunting Steps:

  1. Find your latitude and longitude.
  2. Find Leo by going outside an hour after sunset (about 8-10pm local time).
  3. Match your nighttime sky to one of our magnitude charts.
  4. Report your observation.
  5. Compare your observation to thousands around the world.

Everything you can do on the main page of this project


Night map

Night map