The Portal of Education

How to Measure Light Pollution in the Night Sky:

The Bortle dark-sky scale (usually referred to as simply the Bortle scale) is a nine-level numeric scale that measures the night sky‘s brightness of a particular location. It quantifies the astronomical observability of celestial objects and the interference caused by light pollution. Image: https://skyshop.mx/en/how-we-measure-a-dark-sky/
National Geographic Film “Lost in Light” Showing Bortle Scale of Places in TimeLapse Photography:
Our Bright Globe at Night

Lighting Footprint of the Roaring Fork Valley and Vail

See how we did it in Old Snowmass!

This is the documentation that go us
our designation in Old Snowmass!

Educational Resources:

Reading List:

Discovering The Hidden World Of Nature At Night (Happy Fox Books) Board Book For Kids Ages 3-6 To Learn About Nocturnal Forest Animals