Artificial Light at Night (ALAN)

ALAN is surging

Skyglow fouls the night sky for more than 80% of all people and more than 99% of the U.S. and European populations.
Explore Our Work

Artificial Light at Night (ALAN)


Simple steps can reduce light pollution without compromising safety and even save you money.
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Get Involved

Explore ways to protect Missouri night skies from artificial light at night.  Actions range from taking simple steps at home to promoting our work in parks, cities and with state officials.  We are here to help with expertise and resources.

Dark Sky Places

Help us protect our Missouri heritage by getting parks and cities in Missouri certified under the "International Dark Sky Places Program".  If you are a park or city, you can submit  a request to learn more.

Ordinances, Resolutions


Submit your statute, ordinance, or resolution for listing on our website.  We want to build a comprehensive database of statutes, ordinances, and resolutions in Missouri and we would love to have your listing on our website.

Request a Program

Host an event about light pollution in Missouri.  You can ask us for a speaker or program, or we can provide with resources to help you give the talk on your own.

Lights Out to Save Birds

An estimated 600 millions birds in the U.S. die each year from collisions with buildings during spring/fall migration. Our "Lights Out Heartland" campaign aims to make their migration safer.

Certify Your Home

Is your home nature, neighbor, and night sky friendly? You can find out in four easy steps. Then, follow our user-guide to certify your home and download a free dark sky friendly home certificate! Make your house "neighbor friendly".

Citizen Science

Become a citizen scientist and have fun using your smartphone and telescopes! Explore projects that will help you measure and understand light pollution's impact on the night sky and and life on Earth.

Submit Your Photo

Who doesn't love photos of the Milky Way? We are sharing photos of the Missouri night sky taken by amateur and professional photographers. Please send us your photos and enjoy amazing photos submitted by others.

Missouri Dark Skies

Would you like to find the darkest skies in Missouri? Missouri still has over 50 parks and locations where the Milky Way is visible on a moonless night. We are building maps and tables so you can find the darkest skies in Missouri.

Learning Center

Learn responsible lighting basics, what a "Bortle Scale" means, how to handle a "Light Trespass Problem" and more by exploring our Learning Center.

Resources and News

View DarkSky Missouri's calendar of events, latest news, articles of interest, and download FREE brochures and reports.

ALAN:  State of the Science 2022

“State Of The Science 2022” condenses the current scientific consensus on how artificial light affects seven key topics: the night sky; wildlife and ecology; human health; public safety; energy use and climate change; social justice; and a discussion of the emerging threat from light pollution caused by objects orbiting the Earth. Where gaps exist in our knowledge, we highlight them as targets of future research."


Stacy Park - Fourth UNSP in the World

IDA Missouri is pleased to announce that Stacy Park, located in the City of Olivette, Missouri, has been designated by IDA as the world's fourth Urban Night Sky Place.

VR/360 Film

Enjoy this VR/360 film featuring the Gateway Arch National Park.  The eight-minute, immersive experience provides a 360-degree view of the panoramic view of the night sky above the grounds of the Gateway Arch National Park. The loss of our night sky heritage is illustrated in terms of the Bortle Scale, a nine-level numeric scale that provides a consistent standard for comparing skies with differing levels of light pollution. Viewers can seamlessly pan the night sky in all directions as if standing on the grounds of the Gateway Arch National Park.

Our Mission

The mission of DarkSky Missouri is to raise awareness about light pollution issues in Missouri, promote quality outdoor lighting, protect our natural environment and our beautiful night sky, and educate the public how reducing light pollution can lower energy costs.