Dark Sky Preservation

(IDA, International Dark Sky Association)
RCA Director, Dawn Nilson

The most important issues of light pollution are wasting energy ($$$) with lights shining where they aren't needed
and the adverse affects on human health and wildlife.

RCA supports the International Dark Sky Association
and the
Pacific Northwest Section of International Dark Skies

The RCA Liaison to IDA is Dawn Nilson.
For more information contact her at ida@rosecityastronomers.org

Light pollution is any adverse effect of artificial light, including sky glow, glare,  light trespass, light clutter, decreased visibility at night, and energy waste.

Light pollution wastes energy, disrupts global wildlife and ecological balance, and has been linked to negative consequences in human health.

Mission of the IDA:

The mission of the International Dark-Sky Association (IDA) is to preserve and protect the nighttime environment and our heritage of dark skies through quality outdoor lighting.


1. Stop the adverse effects of light pollution, including;

  • Energy waste, air and water pollution caused by energy waste

  • Harm to human health

  • Harm to nocturnal wildlife and ecosystems

  • Reduced safety and security

  • Reduced visibility at night

  • Poor nighttime ambience

2. Raise awareness about light pollution, its adverse effects, and solutions

3. Educate about the values of quality outdoor lighting.

The Oregon Legislature passed a lighting bill on May 1st, 2009.
House Bill #3367 - HTML version - PDF version

Dave Ingram, NW Leader of IDA - Light Pollution:

A 30 minute discussion on how too much light can impact our life and our environment, and what is being done about it from a radio broadcast on 9/24/2013 - http://www.naturalchoice.net/radio.php

Losing The Dark - a 6 minute video published on Feb 2

Starry skies are a vanishing treasure because light pollution is washing away our view of the cosmos. It not only threatens astronomy, it disrupts wildlife, and affects human health. The yellow glows over cities and towns seen so clearly from space are testament to the billions spent in wasted energy from lighting up the sky.

To help raise public awareness of some of the issues pertaining to light pollution, Loch Ness Productions in collaboration with the International Dark-Sky Association has created a 6.5-minute "public service announcement" called Losing the Dark. It introduces and illustrates some of the issues regarding light pollution, and suggests three simple actions people can take to help mitigate it.

Losing the Dark was initially created in fulldome video format for digital planetarium use. It also has been made as a conventional flat screen video, for use in classrooms, kiosks, museum theaters, and advocate multimedia presentations. Classic planetarium theaters without fulldome capability can show this version using their traditional video projectors.

More information and links to downloads at: http://www.darksky.org/losingthedark

Losing the Dark is a joint production of the International Dark-Sky Association and Loch Ness Productions.


Neighbor friendly fixtures at: http://www.darksky.org/mc/page.do?sitePageId=59689

IDA Slideshow: http://www.scn.org/darksky/slideshow/index.htm

A Slideshow of Photos from Space by Astronaut Sunita Williams

RCA Discussion group at: http://www.rosecityastronomers.org/forum/simple/index.php?board=38.0

NW Region discussion group at: http://groups.google.com/group/light-pollution


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