This week, April 20 – April 26, marks International Dark-Sky Week, an organized effort to diminish light pollution and save our night skies.
For astronomers, the first concern about light pollution is probably its effect on star-gazing. But studies have shown that the brightening night sky also has measurable negative impacts on human health, animal behavior and populations, the environment, and of course, energy use.
Recent studies suggest a connection between higher cancer rates and lower melatonin concentrations resulting from both greater exposure to nighttime lighting and lessened exposure to natural darkness.
For wildlife, the negative impact of artificial lighting is widespread. Nocturnal plants and animals are less productive, migrating species become confused, and predator-prey balances are disrupted by distant skyglow, as well as direct lighting.
The economic and environmental impacts of light pollution are self-apparent in higher energy bills and carbon dioxide waste; and much of nighttime lighting, meant to offer safer conditions, is actually hazardous for drivers and pedestrians and inconsiderate to neighbors.
We can all help to darken our night skies by raising awareness about light pollution. Use this week to learn more and spread the word. Hand out flyers, host star parties, and contact your local representatives and news media. Most importantly, set the best example yourself. Utilize proper shades and energy-efficient bulbs on necessary outdoor lighting, and turn off the lights that you really don’t need.
This week, I will tackle light pollution by turning down my own lights, reaching out with information, and of course, encouraging others to look up. I am going to re-access my outdoor lighting, post flyers, contact my local representatives and weekly newspaper, and, weather permitting, host an impromptu star-gazing event.
What will you do to help bring the night sky back?
* Learn more about light pollution and what you can do to help:
Dark Skies Awareness
International Dark-Sky Association
Need-Less
Light Research Center
Windows to the Universe
Tags: International Dark-Sky Week, Light Pollution, Night Sky