Water is life, on Earth and in space. Dutch ESA astronaut André Kuipers recounts his experience living in space for 204 days, and his time looking back on the blue face of ‘Planet Aqua’, comparing notes with divers about what is going on beneath the waves. He goes on to explore how space technology is being used for water management, from orbital tracking of water quality and pollution to spacecraft-grade recycling systems deployed down on the ground, as well as ambitious efforts to identify marine plastic litter using satellites. Produced for SIWI World Water Week with the support of the Netherlands Ministry of Foreign Affairs.