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International Dark-Sky Association

The IDA's logo

The International Dark-Sky Association (IDA) is a United States-based non-profit organization incorporated in 1988 by founders David Crawford, a professional astronomer, and Tim Hunter, a physician/amateur astronomer. The mission of the IDA is "to preserve and protect the night time environment and our heritage of dark skies through quality outdoor lighting."[1] Light pollution is the result of outdoor lighting that is not properly shielded, allowing light to be directed into the eyes and the night sky. Light that shines into the eyes is called glare and light shining into the night sky above the horizon causes skyglow. Lighting can also cause light trespass when it is directed into areas that it is not wanted, e.g., a neighbor's yard and windows. IDA was the first organization in the dark-sky movement, and is currently the largest.


Principal approachEdit

IDA's principal approach is to raise awareness about the value of dark, star-filled night skies and encourage their protection and restoration through education about the problems and solutions, including outdoor lighting practices that create less light pollution. In 2011, the organization had about 5,000 members in 70 countries.

Among many concerns, IDA and related organizations are collating research on light at night's (LAN) effects on human health and ecology as a result of artificial light at night. The hypothesis is that humans have evolved over millennia exposed to roughly equal periods of light and dark. The disruption of this circadian rhythm can cause hormone imbalance in all living organisms. In the last century, artificial lighting has reduced the regular period of darkness and may negatively impact health. Light at night has been linked to increased incidence of hypertension, attention deficit disorder, obesity, diabetes and some forms of cancer.[2]

International Dark Sky PlacesEdit

To promote awareness about the issues, the IDA has an International Dark Sky Places program that aims "to protect locations of exceptional nighttime visages for future generations." [3]

International Dark Sky ParksEdit

International Dark Sky ReservesEdit

International Dark Sky CommunitiesEdit

See alsoEdit


  1. ^ IDA Mission & Goals Archived 2009-03-28 at the Wayback Machine
  2. ^ Stephen, M. Pauley (2004). "Lighting for the human circadian clock: recent research indicates that lighting has become a public health issue". Medical Hypotheses. 63 (4): 588–596. CiteSeerX doi:10.1016/j.mehy.2004.03.020. PMID 15325001.
  3. ^ 'What is an International Dark Sky Place?', IDS Places
  4. ^ "Hovenweep National Monument Named World's Newest International Dark Sky Park" (Press release). Tucson: SBWire. 2014-07-01. Retrieved 2014-07-14.
  5. ^ "Elan Valley Estate gets Dark Sky Status". ITV News. 2015-07-17. Retrieved 2015-07-22.
  6. ^ "Yeongyang Firefly Eco Park (South Korea)".
  7. ^ "First International Dark Sky Park In Ireland Receives Accreditation". Retrieved 2017-05-06.
  8. ^ "Mayo Dark Sky Park". Retrieved 2017-05-06.
  9. ^
  10. ^ "The International Dark-Sky Association (IDA)". 2016-07-04.
  11. ^ Staff. "2017 - Summer Guide to Waterton-Glacier International Peace Park" (PDF). National Park Service. p. 1. Retrieved 2 July 2017.
  12. ^ "Ramon Crater Named First International Dark Sky Place In The Mideast". 2017-09-14. Retrieved 2018-04-17.
  13. ^ "Fifth International Dark Sky Park In Arizona Designated". 2017-08-31. Retrieved 2018-04-17.
  14. ^
  15. ^ "Isle of Coll secures 'dark isle' status". BBC News. 9 December 2013. Retrieved 9 December 2013.
  16. ^ Keagle, Lauri Harvey (2014-06-25). "Beverly Shores named world's seventh Dark Sky Community". NWI Times. Retrieved 2014-06-25.
  17. ^ Heinsius, Ryan (2014-08-05). "Sedona Becomes the Newest International Dark Sky Community". KNAU. Retrieved 2014-08-05.
  18. ^ "Two Colorado Towns Come Together as Colorado's First International Dark Sky Community status" (PDF). IDA. 9 March 2015. Archived from the original (PDF) on 2 April 2015. Retrieved 9 March 2015.
  19. ^
  20. ^ "Alberta Town Named First International Dark Sky Community In Canada". International Dark-Sky Association. August 12, 2015. Retrieved August 15, 2015.

External linksEdit