Tumacácori National Historical Park
https://www.youtube.com/watch?v=0la-y4OmJQ0http://www.skyandtelescope.com/astronomy-news/60-second-astronomy-news-old-stars-new-clues-dark-sky-destination/Discover the 100th Designated International Dark Sky Place
The International Dark-Sky Association (IDA) has granted its 100th Dark Sky Place designation to the Tumacácori National Historical Park, which preserves three early Spanish colonial missions in the highlands of southern Arizona. Not only are the park’s skies pristinely dark, the park is also proactive in undertaking efforts to curb light pollution, including the installation of IDA-approved lighting fixtures.
WIKI IDA
國際暗天協會（International Dark-Sky Association, IDA）是一個總部設在美國亞利桑那州土桑的國際性非營利組織，於1988年由天文學家大衛·克勞福德（David Crawford）和身為醫生的業餘天文學家提摩西·杭特（Timothy Hunter）成立。IDA 的使命在保護我們夜間天空環境的黑暗，以及藉由管理室外照明的品質傳承夜
