Color Temperature
An introduction to a widely-used characteristic for describing the color of light.

Light Pollution in Massachusetts
Orbiting satellites have mapped how much light is shining upward from the ground below. Here’s what Massachusetts looks like as seen at night from space.

AMA Report on Outdoor Light at Night
Read the American Medical Association’s groundbreaking report on how outdoor light at night can affect human health.

Light Pollution Diagram
Here’s a basic explanation of why some fixtures create far more light pollution than others.

DarkSky Mass Annual Meeting Guest Presentations
A collection of videorecorded talks by specialists who presented at our annual meetings starting in 2019.