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The Siding Spring Observatory, located on the edge of Warrumbungle National Park is Australia’s most important visible light observatory and is one of the few in the world that can observe the whole southern-hemisphere sky.


The Observatory's work is crucial to expanding our understanding of both the universe and the measures required to protect our planet's fragile environment for future generations.


To continue NSW's significant contributions to astronomy and space science research it is essential to have clear dark sky conditions in the region so that our telescopes can operate effectively.


In an ongoing commitment to help protect the dark sky region the Department of Planning and Environment has developed the Dark Sky Guidelines. The guidelines provide key lighting principles and controls to help everyone take part.

View the Dark Sky Planning Guideline

The Environmental Planning and Assessment Regulation 2000 requires consideration of the Dark Sky Guideline for certain development in Coonamble, Dubbo, Gilgandra and Warrumbungle local government areas, as well as larger scale development within 200km of the observatory.


Whether you are a local resident, business owner, lighting retailer or an astronomy enthusiast everyone has a role to play in keeping the beautiful night sky free from light pollution.






The Regulation also requires:

  • a consent authority to consider the Guideline for regional development, State significant development and designated development within 200 km of the Observatory
  • a proponent to consider the Guideline when preparing an environmental impact statement for State significant infrastructure; and
  • a certifying authority to ensure that lights installed in a development comply with certain standards when issuing an occupation certificate for a dwelling house, dual occupancy or secondary dwelling that is complying development on land in areas of Coonamble, Dubbo, Gilgandra and Warrumbungle.



For more information about the Siding Spring Observatory, visit:

Page last updated: 01/05/2018