This lecture by the instructor explores the use of space technology to observe cities, focusing on monitoring the built environment, green spaces, and assessing citizens' quality of life. With the availability of high-resolution satellite sensors, it is now possible to analyze urban trends, understand neighborhood typologies, and improve the city experience. The lecture emphasizes the importance of global urban footprint products for organizations in Southern countries and showcases examples of urban expansion in different cities. Additionally, it discusses the generation of detailed information about buildings, energy consumption, and solar potential using very high-resolution satellites and auxiliary data. Overall, the lecture highlights the potential of space technology in enhancing our understanding of urban dynamics and the quality of life in cities.