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You’re Never too Young (or Old) to Become a Dark Sky Advocate

Shadow of hands forming a heart with the Milky Way in the background

By high school senior and dark sky advocate Jessica Elliott When I was in the third grade, my class took a trip to a wetlands to see the way Earth is interconnected with the animals… Read More

Learn why you shouldn’t bare your bulbs! Watch now…

Learn why you shouldn’t bare your bulbs! Watch now… Thumbnail

Lighting demonstration by Keith Kreuger, IDA Pinal County (Arizona) Chapter Leader, illustrating the difference between a bare bulb and a shielded bulb. Cover your bare bulbs! No one likes to look at a bare light… Read More

5 Things You Can Do to Protect the Night Sky

Person standing under a natural arch at Arches National Park with the Milky Way over head

Happy International Dark Week! Light pollution affects everybody! The good news is that light pollution, unlike many other forms of pollution, is reversible and each one of us can make a difference. Here are a… Read More

Annual “Earth & Sky” Photo Contest Now Open

“The Enchanted Forest” by Lyubov Trifonova. The Moon and the northern lights lit up the snow-covered forest in Murmansk, northwestern Russia, Dec. 2014. The first winner of the 2015 International Earth & Sky Photo Contest, Beauty of Night Sky category.

By Guest Writer David Malin, The World at Night and “Earth and Sky” Photography Contest Judge The World at Night (TWAN) is once again holding its “Earth and Sky” photography contest. The contest, now in… Read More

Light Pollution Measure Passed by Washington State

The City of Seattle, Washington, skyline at night with the Space Needle in the foreground.

On Friday, March 26, Washington Gov. Jay Inslee signed a supplemental state transportation budget that includes what may well be the first ever mention of light pollution to make it into state code. The transportation budget may seem an odd… Read More

IDA Publishes in LED Professional magazine

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IDA is excited to announce the publication of our ‘special topic’ article “The Value of Dark Skies – About Environmentally Friendly Lighting” in the March/April issue of LED Professional magazine. We are always trying to reach industry… Read More

City Lights from Space

A satellite image of Las Vegas showing a sea of lights.

It’s no secret that city lights are brighter than starlight. Almost everyone, from amateur stargazers to professional astronomers, has experienced how hard it can be to see the stars when they are eclipsed by the… Read More

Little Penguins Waddling on the Dark Side

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By guest writer Airam Rodríguez, a postdoctoral researcher at Phillip Island Nature Parks, Australia, and Estación Biológica de Doñana CSIC, Spain Visible light on Earth largely comes from the sun and varies daily, even at night… Read More

Lessons from the Retrofit Revolution

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A recent news article draws attention to a new street lighting project just completed in downtown Philadelphia, Pennsylvania. This retrofit included replacing hundreds of high-pressure sodium lights with new, more energy-efficient, white LEDs. Philadelphia officials had good intentions in deploying… Read More

Night Sky Data to the People!

A satellite image of Berlin at night showing the difference between the lights of west and east Berlin.

New Citizen Science Project Lets Anyone Analyze Night Sky Brightness Data As streetlights the world over change from sodium lamps to LED, scientists wonder what this means for night skies. Because all cities don’t light the… Read More