Is light pollution really a problem?

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Is light pollution a real problem or just something that first world people complain about when they have nothing else to complain about? How much of a problem are Elon Musk's StarLink satellites really? In this video we'll look at the data.

The full video about the guys in Rennes turning off shop lights is here: https://www.youtube.com/watch?v=VVxgGWbiDY8

Light pollution data and images at around 2 minutes from this website: http://www.lightpollution.it/dmsp/index.html

The paper I mention at 4 mins 2 seconds is here: https://academic.oup.com/sleep/article/39/6/1311/2454030

The Cerro Tololo image is here: https://noirlab.edu/public/images/iotw1946a/

The paper I mention at 9 minutes 17 seconds about the Zwicky Transient Facility is here: https://iopscience.iop.org/article/10.3847/2041-8213/ac470a

The BBC interview I mention at 10 minutes is here: https://www.bbc.com/news/science-environment-60262100

The ESO paper I show at 10 minutes 20 seconds is this: https://www.aanda.org/articles/aa/abs/2020/04/aa37501-20/aa37501-20.html

The IAU press release I mention at 10 minutes 50 seconds is here: https://www.iau.org/news/pressreleases/detail/iau2201/

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Many thanks to Jordi Busqué for helping with this video http://jordibusque.com/

0:00 Intro 0:51 What is light pollution? 2:36 What are the consequences? 6:56 What can we do? 8:27 How bad is StarLink? 11:24 Sponsor message

#science #astronomy #health