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GLOBE at Night 2010 is NOW! 3 - 16 March

posted Mar 5, 2010, 8:01 AM by Jason Bilotta   [ updated Mar 5, 2010, 8:19 AM ]


GLOBE at Night is an annual 2-week campaign in March. People all over the world record the brightness of their night sky by matching its appearance toward the constellation Orion with star maps of progressively fainter stars. They submit their measurements on-line and a few weeks later, organizers release a map of light-pollution levels worldwide. Over the last four GLOBE at Night campaigns, volunteers from over 100 nations have contributed 35,000 measurements.

Thanks to everyone who participated in the 2009 GLOBE at Night campaign during 16-28 March! Through GLOBE at Night, students — alongside teachers, parents and community members — amassed a data set from which they can begin to explore the concept of light pollution and to research the patterns of light pollution across the globe. (reposted from

A record number of over 15,000 measurements were received in the 2009 campaign! See this data on the Map page.

An audio podcast (10 minutes) on light pollution and how to participate in GLOBE at Night:

A powerpoint (with audio and written transcripts) on light pollution and how to participate in GLOBE at Night:

More GLOBE at Night 2010 News.

Five Easy Star-Hunting Steps:

1) Find your latitude and longitude.

2) Find Orion by going outside an hour after sunset
(about 7-10pm 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.