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AMA Report Affirms Human Health Impacts from LEDs

This photo shows the divide between East and West Berlin that is still visible at night from space. On the left are the gas lamps of the West and on the right, the orange high-pressure sodium lamps of the East, with a stark contrast between them. The image is a powerful reminder that lighting choices made by city planners are long lasting.

A groundbreaking report recently released by the American Medical Association (AMA) Council on Science and Public Health affirms known and suspected impacts to human health and the environment caused by light emitting diodes (LEDs) that… Read More

80% of World Population Lives Under Skyglow, New Study Finds

World map of artificial sky brightness. Image from the new "World Atlas of Artificial Night Sky Brightness."

A groundbreaking new study documenting light pollution across the globe finds that more than 80 percent of the world’s population lives under light polluted skies. The United States and Europe have it even worse, with… 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

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

IDA Annual Conference is a Great Success

Travis Longcore, light pollution researcher and Karen Trevino, chief of the NPS Natural Sounds and Night Skies Division, speaking at the 2015 AGM Plenary Session.

The 2015 AGM conference was a great success! The Embassy Suites in Phoenix was filled with people from all over the world passionate about protecting our night skies. The conference theme, “One Coin ~ Two Sides… Read More

2015 AGM Conference Abstracts Are Available

Flocks of birds flying over water while the sun is setting causing vibrant orange clouds

Conference Abstracts One Coin ~ Two Sides Impacts of Light Pollution to Fish and Wildlife Resources and the Mitigating Role of Emerging Lighting Technologies * Presenters’ PowerPoint presentations will be available soon. Saturday November 14… Read More

Help measure how the night sky is changing

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By Guest Author Chris Kyba On Saturday, September 12 2015, you can join thousands of people around the world in measuring how bright the night sky is where you live. The results from this experiment… Read More

Bring on the Night, Says New UVM National Park Study

Two people huddled together looking out over Eagle Lake at Acadia National Park under a starry night sky.

Natural wonders like tumbling waterfalls, jutting rock faces and banks of wildflowers have long drawn visitors to America’s national parks and inspired efforts to protect their beauty. According to a UVM-led study published Sept. 4… Read More

Mapping Earth’s Night One Picture at a Time

NASA nighttime satellite photo of East and West Berlin, Germany, showing the difference in lighting.

Cities at Night is a citizen science project that invites the public to help analyze nighttime images taken from the International Space Station. This valuable information helps researchers better assess light pollution across the globe… Read More

Journal Provides Free Access to its Theme Issue on Artificial Light at Night

A NASA nighttime satellite image of the City of Paris showing a lot of light pollution.

  The academic journal Philosophical Transactions B is allowing free access through September to all articles published in its themed issue “The biological impacts of artificial light at night: from molecules to communities.” The biological… Read More