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Wednesday 11 February 2026 12:43:30 GMT
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![What the ISS sounds like 🔉 Our astronaut Sophie Adenot shared this video on her social media channels with the caption: [EN] Day 121, orbit 1873 — Sunday morning science with Sophie, episode 9: Hunting for sounds, part 2. Before anyone from the NASA engineering teams starts wondering why the TOCA is clicking while it’s switched off… I obviously could not turn it on just for the purpose of this video, so I recorded the sound later on during actual operations. It’s my absolute favourite sound onboard the Station! The sound consists of the checkout of several valves, which are used by this Total Organic Carbon Analyzer. This beautiful piece of engineering is used to test the quality of the Station's drinking water. 98% of the water onboard is recycled, isn’t it amazing? [FR] Jour 121, orbite 1873 – La science du dimanche matin avec Sophie, épisode 9 : Chasse aux sons, partie 2. Avant que quiconque ne se demande pourquoi le TOCA cliquète alors qu’il est éteint… Je ne pouvais évidemment pas l’allumer juste pour cette vidéo, j’ai donc enregistré le son plus tard, pendant des opérations réelles. C’est de loin mon son favori à bord de la Station ! Il s’agit en fait de la vérification de plusieurs valves du Total Organic Carbon Analyzer, une petite merveille d’ingénierie qui teste la qualité de l’eau potable de la Station. Nous recyclons 98% de notre eau à bord – épatant, non ? 📹 ESA/NASA #ESA #Astronaut #ISS](/video/cover/7651636458155019552.webp)
