The classic image of the world at night shows the light from countless bulbs pouring into space. By definition, the light reaching a VIIRS night band sensor, flown on satellites orbiting at 824 kilometers elevation… Read more
Artificial Light at Night: State of the Science 2022 Report

by John Barentine Dark Sky Consulting, LLC To confront problems effectively, we must understand them. And to tackle the problem of light pollution around the world, we must become familiar with the knowns and the… Read more
New App Aims to Better Understand Nighttime Satellite Data

A team of community scientists and researchers from the Helmholtz Centre Potsdam – GFZ German Research Centre for Geosciences have developed a new mobile app called ‘Nachtlicht’ (NightLights). The app allows participants to record various… Read more
Call for Abstracts for the 2018 Annual General Meeting

Looking Up! 30-Years of Dark Sky Advocacy IDA’s 30th Annual General Meeting November 9-11, 2018 | Snowbird, Utah The International Dark-Sky Association is pleased to invite you to the 30th Annual General Meeting which will… Read more
Five Years of Satellite Images Show Global Light Pollution Increasing at a Rate of Two Percent Per Year

Five years of advanced satellite images show that there is more artificial light at night across the globe, and that light at night is getting brighter. The rate of growth is approximately two percent each… Read more
Small Changes, Big Impact

IDA approved Dark Sky Friendly fixtures light only the ground where light is needed. It’s a simple idea that saves energy and reduces skyglow to preserve our view of the night sky. A consumer-based lighting… Read more
International Dark Sky Week: 5 Ways to Support Dark Skies Right Now
The nighttime environment is a crucial natural resource for all life on Earth, but the glow of uncontrolled outdoor lighting has hidden the stars, radically changing the nighttime environment. International Dark Sky Week draws attention… Read more
SKYGLOW: Hunting the Dark
Pursued in collaboration with the International Dark-Sky Association, SKYGLOW explores the history and mythology of celestial observation and the Dark Sky Movement that’s fighting to reclaim the night skies. There’s no such thing as a snapshot… Read more
5 Popular Myths About LED Streetlights

The rapid changes in LED lighting technology have given rise to an LED retrofit revolution. Across the globe, municipalities are opting to switch out their older street lighting to new, more energy-efficient LEDs. Unfortunately, these… Read more