Chapter 1 - The sky as a cultural heritage.- Chapter 2 - The fascination of light - And that of darkness.- Chapter 3 - Earth at Night.- Chapter 4 - Artificial lights as a health hazard.- Chapter 5 - Artificial lights' impact on flora and fauna.- Chapter 6 - How do we measure the sky darkness?.-Chapter 7 - What can we do?.- Chapter 8 - Searching of the darkest places.- Chapter 9 - Full immersion in the radio waves.- Chapter 10 - A sky full of satellites.- Chapter 11 - Who gave permission?.- Chapter 12 - Proposals to mitigate adverse impact.
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