When satellites take pictures of Earth at night, how much of the light that they see comes from streetlights? A team of scientists from Germany, the USA, and Ireland have answered this question for the… Read more
It’s Earth Day! Is your home lighting nature, neighbor and night sky friendly?
What better way to celebrate Earth Day (and Night!) than by making your home dark sky friendly? In recognition of International Dark Sky Week, IDA has released a simple home lighting assessment to help you… Read more
Women and Girls in the Dark Sky Movement
February 11th is the International Day of Women and Girls in Science, a day to celebrate the incredible contributions women have made to science and technology, highlight the gender inequities in the industry, and inspire… Read more
What Does Lettuce Have To Do With My Night Sky?
by John C. Barentine, Ph.D. Director of Public Policy Residents of cities in towns in North America and Europe increasingly report strange glows in the night sky. Arizonans see their skies light up bright purple… Read more
Sahuarita Town Council Receives Certificate of Recognition from International Dark-Sky Association
Sahuarita, AZ – The Sahuarita Town Council was recognized yesterday evening by the International Dark-Sky Association (IDA) for Innovation in Lighting for the sports field lighting installation at the Quail Creek-Veterans Municipal Park. In 2015… Read more
IDA Announces Lighting Guidelines for Electronic Messaging Centers
Today the International Dark-Sky Association released lighting guidelines for electronic messaging centers (EMCs). The guidelines, developed in line with Illuminating Engineering Society’s off-roadway sign recommendations, are the culmination of a two-year IDA process to address… Read more
IDA Urges Decision-Makers in China Consider Cost-Effective Alternatives to “Artificial Moon”
According to recent media reports, China’s Chengdu, a city in the Sichuan province, has announced plans for an experimental “artificial moon” to be launched in 2020, with two additional satellite launches slated for 2022. The… Read more
Texas Collaboration Protects Dark Skies
The western part of Texas is home to one of the largest oil and gas producing regions in the US, the Permian Basin. Also located in this area is the McDonald Observatory, home of the… Read more
Kanab, Utah Preserves View of the Stars with Outdoor Lighting Ordinance
On June 26, 2018, after a two-year citizen-led effort, the Kanab City Council enacted an outdoor lighting ordinance to protect the natural darkness that makes Kane County, Utah, a great place to see stars. Residents… Read more
How Light Pollution Affects the Pennsylvanian Ecosystem
By guest writer, Craig Campbell As little as 100 years ago, it was possible to look up in the sky at night and see millions of stars spread across the Milky Way. Now, there are… Read more