Astronomers study the night sky to learn about the universe but the increase in outside lighting makes this difficult. To respond to this problem, many areas around the world are being set aside as Dark Sky sanctuaries, with strict controls around outside lighting.
Actions we can take to reduce the harmful effects of blue light on the night sky
Be aware that light pollution reduces our ability to see features in the night sky.
Reduce light pollution by using outdoor lighting only when and where needed; ensure light does not spill upwards or into unintended areas; and select amber or warm white sources over those with higher blue emissions.
Modify the lighting of communities, parks, reserves and sanctuaries so that they meet international standards for good outdoor lighting practice set out in the Dark Sky Places Program.
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