07 Mar 2013

Does Orion look like this to you? You must be looking from a dark site, such as Ocracoke Island, NC. Or there is a massive power outage.

How dark is your sky? The constellations will tell you. The more stars you can see in a given constellation, such as Orion or Leo, the darker your sky.

By going outside at least one hour after sunset and making simple observations about the stars you can see, you can participate in a worldwide citizen-science project to map light pollution around the globe.

Everything you need to know can be found at the GLOBE at Night website. The site has activity packets designed for families and teachers.

This is how Orion looked tonight from outside Morehead Planetarium in Chapel Hill, NC, where many outdoor lights are unshielded, washing out the fainter stars—and failing to light the ground effectively and efficiently.

Through March 12, you can use Orion to collect your data. For later campaigns — March 31-April 9 and April 29-May 8 — use Leo instead. (If you stumbled across this blog from the southern hemisphere, you can use Crux, the Southern Cross.)

Submit your data online with GLOBE at Night’s web app. Your data helps create an interactive map of observations worldwide. Then you can compare your results with others’ reports.

Want to learn more about dark skies? Join us for “Our Vanishing Night” at Morehead Planetarium and Science Center on Saturday, March 9, 2013, from 3:30-4:15 p.m.

Orion has lost his belt and is unrecognizable. Perhaps you are in Manhattan. (Orion images from globeatnight.org)

You’ll learn how to identify the stars of Orion, Leo, and other constellations; hear a cultural star story or two; see a light shielding demo that will amaze you; and experience the planetarium sky at varying levels of light pollution, including a pristine dark sky lit only by thousands of stars and the Milky Way.

Amy Sayle was the 6,384th Citizen Scientist to submit data to GLOBE at Night.

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