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Cornell Lab of Ornithology


GLOBE at Night

GLOBE at Night

is coordinated by the

National Optical Astronomy Observatory

in partnership with

Environmental Systems Research Institute, Inc. (ESRI), Centro de Apoyo a la Didáctica de la Astronomía, International Dark-Sky Association,



Open the GLOBE at Night website




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. For two weeks in February or March, when the Moon is not out during the early evening and the constellation of Orion can be seen by everyone all over the world, children and adults match the appearance of Orion with 7 star maps of progressively fainter stars found at They then submit their measurements (e.g., which star map they chose) on-line with their date, time and location. The database, now containing over 53,000 observations, can be used to explore the effects of light pollution on wildlife, health, demographics, energy, cost and astronomy.


Open the GLOBE at Night website  small arrow



Topic - light pollution, energy, astronomy, wildlife, health

Audience - public, K-12, college, nature & science centers & museums

Location - worldwide

Goals - awareness, preservation, conservation, education, research

Other - Feb & March, clear night sky, moonless, Orion up



Connie Walker, Director, GLOBE at Night Campaign, Associate Scientist & Senior Science Education Specialist   email Connie


Citizen science, volunteer monitoring, participatory action research... this site supports organizers of all initiatives where public participants are involved in scientific research.

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