|Main Entry:||Bortle dark-sky scale|
|Part of Speech:||n|
|Definition:||a classification of nighttime darkness for amateur astronomers; a nine-level numeric (and color coded) measure of the night sky brightness of a particular location|
|Example:||John Bortle created a light pollution scale for the February 2001 edition of Sky and Telescope.|
Dictionary.com presents 366 FAQs, incorporating some of the frequently asked questions from the past with newer queries.