International Dark-Sky Association founded (1988)
Astronomers David Crawford and Tim Hunter founded the International Dark-Sky Association to address light pollution, the excessive or misdirected outdoor lighting that washes out the night sky and disrupts ecosystems.
The group grew into the leading advocate for outdoor lighting regulation, pushing cities to adopt lighting rules.
It created a certification program for dark-sky places and made light pollution a recognized policy issue.
Alexandria's night illumination ordinance sits in the same policy area — regulating outdoor lighting on private property to limit its effects.
