The sky is an integral part of the environment perceived by humanity. For this reason we must defend it from light pollution, a problem that affects not only the beauty of the dark night sky but also the scientific research made by astronomers. Moreover, the space exploration (from SpaceX to others) is sending an enormous number of satellites in the terrestrial orbit, shading the view that the astronomers study. We should not neglect this problem, we have to act now before it would be too late for our sky.
Patrizia Caraveo is an Italian astrophysicist. She has worked on several international space missions and has been the Director of Research at the Istituto di Astrofisica Spaziale e Fisica Cosmica in Milan since 2002. She was among the first to understand the fundamental role of neutron stars in particle physics and she has published lots of scientific works and books, even translated in other languages.