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5 Appalling Facts about Light Pollution

Light pollution in Los Angeles obscures the night sky.

  The sky glow of Los Angeles is visible from an airplane 200 miles away. Residents of L.A. haven’t been able to see the stars for a while. In fact some city dwellers don’t even… Read More

The Importance of Awe

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The “11th emotion” got many of us into astronomy. Can children today still experience it? Guest post by William Sheehan, courtesy of Sky & Telescope While struggling in abject poverty in Nashville after the Civil… Read More

What Do Dark Skies Mean to You?

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Guest Post by Emma Marrington, senior rural policy campaigner for Campaign to Protect Rural England (CPRE) When was the last time you experienced a truly dark, star-filled night sky, even in the countryside? Or saw the… Read More

Three Surprising Creatures Affected by Light Pollution

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Every year we see lots of new research on the effect of artificial light at night on various types of wildlife. Many of us know of the impact of light pollution on wildlife such as… Read More

5 Species Threatened by Light Pollution

Light pollution over Chicago

  5. Sea Turtles Sea turtles live in the ocean but hatch on the beach at night. Hatchlings find their way to the sea by detecting the bright horizon over the ocean. Artificial lights can… Read More

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

Night Lights and Prosperity Don’t Always Go Hand in Hand

Photo ISS043-E-247811 of North and South Korea from the International Space Station ISS.

By guest writer Chris Kyba North Korea is famously dark compared to South Korea and China at night, and images like the one above are often used to demonstrate the consequences of its “unenlightened” policies. I certainly wouldn’t… Read More

Participate in “Starlight, Beyond Light Pollution Leadership Training Forum”

A panorama of the Milky Way.

By Audrey Fischer, IDA Chicago chapter leader To those who love the starry night sky, We are at the midst of a global crossroad. The undeniable transition to LEDs can either restore our starry night… Read More

Happy Earth Day (and Night!)

A ying yang symbol, with one representing day and the other night and the text "Because every day needs a night."

Earth Day was started in 1970 to celebrate the intricate beauty of Earth and raise awareness about the importance of its environmental protection. The global annual event is observed on April 22 and is now… Read More