The night sky is getting dramatically brighter due to light pollution spreading across the globe — and it poses an existential crisis for our ability to study space.
last week found through 51,351 citizen scientists' observations from 2011 to 2022 that light pollution increased the brightness of the night sky by 7%–10% per year.suggested an increase of about 2% per year.published at the end of 2022 found 21 of 28 "major astronomical observatory sites" are under skies that have a level of light pollution that is able to seriously affect their observations.
"A bridge over a river is not a wall for some species, but during the night when it is lighted, this light is cutting the river in half for some species. So we are fragmenting the environment where animals live."of the GFZ German Research Centre for Geosciences and one of the authors of the new study, a good rule of thumb is to only light what needs to be lit — like a sign — when it needs to be lit and only the amount of light that you need for it to be seen.
Astronomers worry that as the sky fills up with satellites — like SpaceX's Starlink constellation — it will become more difficult to see the stars behind the swarms of moving spacecraft.to mitigate the impacts of the Starlink constellation on observatories on Earth, including adjustments to the satellites themselves to make them look darker.Scientists stress that more research is needed in order to figure out exactly why night skies appear to be increasing in brightness each year.
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