Most light pollution isn’t coming from streetlights

The bane of every astronomer's existence.
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Most light pollution isn’t coming from streetlights

Post by fred8615 »

Light pollution is the arch nemesis of astronomy, spoiling both the enjoyment of the night sky and the professional study of our universe. For years we’ve assumed that streetlights are the main culprit behind light pollution, but a recent study has shown that streetlights contribute no more than 20% of all the pollution, and if we want to solve this vexing astronomical problem, we have to think harder.

Streetlights, car headlights, billboards, sports stadiums, store displays and signs. The trappings of modern civilization, making for safer (not to mention more entertaining) nighttime hours. But the bounty of modern civilization makes for polluted night skies. The more we turn on our lights at night, the less we can access the skies that our ancestors knew and loved.

Read more: ... eetlights/
Frederick J. Barnett
"Someone's got to take the responsibility if the job's going to get done!! Do you think that's easy?!" Gregory Peck - The Guns Of Navarone
Christopher K.
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Re: Most light pollution isn’t coming from streetlights

Post by Christopher K. »

This may be true. The best and quickest way to tell where a concerned citizen should focus energy (so to speak) probably is to rank the sources of light pollution by percentages each source contributes.

What I mean to say: streetlamps may create only twenty percent of light pollution (and this study's results should be confirmed with another's), but if no other source contributes more than twenty percent, capping and shielding badly designed streetlamps then replacing them when broken or worn out with better designs is probably the best first step to natural skies.
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