Lights in the sky ✨ The telescope gazing at the Milky Way in admiration is the Danish 1.54-meter telescope, hosted at La Silla in #Chile. And do not worry, the green glow we see in this image –too faint to be seen with the naked eye– is not a result of urban light pollution. This is a natural phenomenon known as airglow. What causes it? Find out: https://www.eso.org/public/images/potw2645a/ 📷 J. Rodrigues/ESO #astrodon #astronomy #astrophysics #space #science