Tuesday, March 28, 2023

Fewer and fewer stars to be seen in the night sky

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Light pollution stronger than expected

Fewer and fewer stars to be seen in the night sky

Observing stars in the night sky becomes more difficult. In some places, in less than 20 years, only half as many stars will be visible to the naked eye in the night sky, according to a study published Thursday in the journal Science.

Published: 18 minutes ago

A large part of the world’s population lives under a more or less light-polluted sky.

The reason for this is light pollution from artificial light, which is greater than previously assumed based on satellite images.

The study is based on the observations of around 51,000 so-called citizen scientists, mainly in the USA and Europe, in the years 2011 to 2022. They reported the number of visible stars in their place of residence. From this information, the scientists calculated that light pollution increased by an average of 9.6 percent per year. If it continues to increase at this rate, a place where you can see 250 stars today would only be able to see 100 in 18 years.

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