This document contains satellite photos of Europe, Africa, and the Americas at night, highlighting the patterns of light across major cities and geographical features. In the photo of Europe and Africa, the lights of Paris and Barcelona are visible, while London, Lisbon, and Madrid are still in daylight. The Azores islands can be seen in the Atlantic Ocean. For Brazil, the large cities of São Paulo, Rio de Janeiro, Salvador, Recife, Fortaleza, Brasília, Goiânia, and Uberlândia stand out at night. The photo of the US shows the dense cluster of lights from Boston to Washington DC, with daylight still present in California. The document urges sharing these photos so