Artificial lighting is making the night sky about 10% brighter each year, a new study finds.
project was collected in a similar fashion. Volunteers look for the constellation Orion — remember the three stars of his belt — and match what they see in the night sky to a series of charts showing an increasing number of surrounding stars.had estimatedBut the satellites used aren’t able to detect light with wavelengths toward the blue end of the spectrum — including the light emitted by energy-efficient LED bulbs.
The satellites are also better at detecting light that scatters upward, like a spotlight, than light that scatters horizontally, like the glow of an illuminated billboard at night, said Kyba. “Migratory songbirds normally use starlight to orient where they are in the sky at night,” she said. “And when sea turtle babies hatch, they use light to orient toward the ocean — light pollution is a huge deal for them.”
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