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.
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?
Light pollution is pervasive, and its impact on people is larger than you might think.
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.
It's high time that we amateur astronomers got serious about protecting the night sky from 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.
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.
Light pollution is most amateur astronomers' worst enemy. Learn here how to measure and describe how brightly your sky glows.
Bright skies aren't empty skies. See for yourself how many treasures lie hidden in the glow of a city sky.
This flyer (which can also be printed as a PDF) tells you everything you and your neighbors need to know about how to address light pollution in your neighborhood.
A primer on light-pollution jargon
How to light your home safely, save energy, and decrease light polluion at the same time.
In the war against light pollution astronomers have gained important new allies -- and new insights into how we see at night.
You don't have to fight city hall. To ban bad lights, make city hall your friend.
Here's how to find exterior residential lighting that's dark-sky friendly.
One person can make a difference, as demonstrated by a high-school student's single-handed effort to help us all appreciate the night sky.
Here's a selection of manufacturers and suppliers of good lighting equipment.
Excellent? Typical? Urban? Use this nine-step scale to rate the sky conditions at any observing site.
Only a tiny fraction of amateur astronomers do anything to help reduce bad outdoor lighting. We need to change that.
Knowledge is power: here are the facts you need to help you combat light pollution in your neighborhood.
Light pollution has become so pervasive that it compromises the view of the universe for an estimated 90 percent of Americans.