"Our lives begin to end, the day we become silent about things that matter"
- Dr. Martin Luther King Jr.
Measuring the Sky's Darkness
The Oregon Chapter of IDA has established a network of continuously-recording Sky Quality Meters (SQMs) in Central Oregon identified as the Central Oregon Sky Glow Measurment Network, or COSMN. Skyglow refers to the type of light pollution seen as the brightening of the night sky over inhabited areas. Sky glow occurs from unshielded lights and from light reflected off of surfaces (see below illustration). SQMs measure the brightness of the night sky and provide a measure of both light pollution and natural light at night.
Click on the PDF below to read the technical report on the COSMN from June to Mid-August 2019