National Geographic

Three telescopes ofthe Deimos Sky Survey,based in Spain, watchfor close asteroids andman-made space debristhat could damagesatellites, as an airplanestreaks across the sky.Noelia Sánchez Ortiz,an aerospace engineer,and Jaime Nomen, anastronomer and thehead of the observatory,monitor the instruments.LUCA LOCATELLITHE SKYWATCHING