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International Dark Sky Week 2023

Save Dark Skies

"Discover the Night" During International Dark Sky Week, April 15–22

Protect the night sky — join the International Dark-Sky Association for activities during International Dark-Sky Week.

Infographic showing increasing skyglow and disappearing stars

Astronomy and Society

Light Pollution Is Increasing Even Faster Than We Realized

The average brightness of the night sky is increasing by 10% every year, making the stars less visible.

Light pollution map for North America

Astronomy and Society

Light Pollution Is Creeping Up on the World's Observatories

Astronomical observatories enjoy some of the world’s darkest night skies. But even there light pollution is spreading, a new study suggests.

BlueWalker 3 satellite panel dwarfs team that built it

Astronomy and Society

Bright New Satellites Join a Crowded Sky — Here’s How You Can Help

The imminent launch of a BlueWalker satellite, with a giant phased array antenna, portends a brightening night sky. Amateur astronomers can help record these changes with the goal of mitigating them.

ISS view of Earth at night

Astronomy and Society

What we know about Light Pollution – and What We Don’t

The International Dark-Sky Association’s has summarized more than 300 peer-reviewed studies on the effects of artificial light at night in an effort to help dark-sky advocates.

International Dark Sky Week 2022

People, Places, and Events

Celebrate Dark Skies This Week, April 22–30

Are you interested in combating light pollution? International Dark Sky Week, which starts today, offers events in which you can learn how.

International Dark-Sky Association 2021 Virtual Conference

Save Dark Skies

Under One Sky: Let's Address Light Pollution Together

Concerned about light pollution? Join a virtual conference this weekend that looks at ongoing global efforts to mitigate it.

Pittsburgh photographed from above

Astronomy and Society

Pittsburgh Goes Dark: Could This New Dark-Sky Ordinance Begin a Trend?

The city's parks, facilities, and streetlights will all get dark-sky-friendly lighting, but is it too early for amateur astronomers to get excited?

Counting stars during the pandemic

Stargazer's Corner: Adventures Under the Night Sky

The Pandemic and Light Pollution

Student Kathryn Huth set out to conduct astronomical experiments when she noticed that — amidst the pandemic — she could see more stars in the sky.

People, Places, and Events

Discover the Night: International Dark Sky Week is Here!

Light pollution is insidious in today’s world. This International Dark Sky Week, become inspired to see what you can do to raise awareness.

Dark skies

People, Places, and Events

Under One Sky — Help Address Light Pollution

Do you care about protecting the night sky? Join the International Dark Sky Association’s virtual conference this weekend.

a child outside at night catching fireflies with a net

Save Dark Skies

Photographers “Capture the Dark” with Stunning Images of the Night

Stunning images of the night remind us why we need to protect dark skies. See the photos that won the International Dark-sky Association's contest.

Save Dark Skies

How Dark Is Your Night Sky?

Traditional and digital tools can help you learn the naked-eye magnitude limit of your sky and find out if the darkness has changed at your observing site.

Light Pollution Map - Canary Islands

Save Dark Skies

Starry Success: Protecting the Night Sky Above La Palma

Ten years ago, La Palma was declared a "Starlight Reserve" and measures were implemented to protect its skies from light pollution. How did they work?

Save Dark Skies

Measuring the Impacts of Light Pollution

Light pollution is pervasive, and its impact on people is larger than you might think.

Milky Way from Arches National Park

Astronomy and Society

It's International Dark-Sky Week!

What began as a student's simple idea a decade ago has grown into a worldwide celebration of the night sky and easy ways to reduce light pollution.

Canyonlands National Park at night

Save Dark Skies

Help Keep Our Skies Dark — Join IDA Today

It's high time that we amateur astronomers got serious about protecting the night sky from light pollution.

Measuring skyglow in Arizona

Save Dark Skies

Rate the Darkness of Your Sky

A new website shows how light pollution spreads around the globe — using data gathered by its users.

Cheney in Times Square

Astronomy and Society

AMA Addresses Light Pollution

The American Medical Association has released a report detailing several possible health concerns related to nighttime light exposure. But some lighting researchers worry the conclusions are more alarmist than is warranted.

Mario Motta

Save Dark Skies

U.S. Physicians Join Light-Pollution Fight

Thanks to a full-court press by a cardiologist with a passion for astronomy, the American Medical Association has taken a stance in the fight to make outdoor lighting more benign to humans — and to the stars above.