GLOBE at Night


The GLOBE at Night campaign forĀ  2014 will be collecting observations during particular dates each month, roughly between 8pm – 10pm local time, when the Moon is not up.

Those dates are:

- January 20-29
- February 19-28
- March 21-30
- April 20-29
- May 19-28
- June 17-26
- July 16-25
- August 15-24
- September 15-24
- October 14-23
- November 12-21
- December 11-20

GLOBE at Night is a citizen science project to record the brightness of the night sky around the world. During twelve observing campaigns in 2014, children and adults are asked to match the appearance of a constellation (Orion or Leo in the northern hemisphere, and Orion or Crux in the southern hemisphere) with seven star charts of progressively fainter stars. The data is collected to produce an interactive map of all worldwide observations.

The Globe at Night ( program is an
international citizen-science campaign to raise public awareness of the
impact of light pollution by inviting citizen scientists to measure their
night-sky brightness and submit their observations (at ) from a computer or smartphone. Light
pollution threatens not only our "right to starlight," but also can
adversely affect energy consumption, wildlife, and health. Nearly 100,000
measurements have been contributed from people in 115 countries during the
campaigns over the last 8 years, making Globe at Night the most successful
light-pollution-awareness program to date. 
For 2014 Globe at Night offers four ways to measure night-sky brightness: 
1.the traditional method of matching what you see in a constellation with star charts; 

2.the use of a handheld digital device called a Sky Quality Meter (; 

3.the use of the Loss of the Night app on Android phones 
which asks you to find certain stars as a measure of star visibility; 

4.the use of the Dark Sky Meter app on iPhone 4s and iPhone 5/5s/5c (,
 which uses the phone's camera to measure
night-sky brightness. 

Explore the last 8 years of data in our interactive
map (, or see how your city did with our
map app ( The Globe at Night website
is easy to use, comprehensive, and holds an abundance of background
information. The database is usable for comparisons with a variety of other
databases, such as how light pollution affects the foraging habits of bats.

Make a difference and join the GLOBE at Night campaign!