How long do the oxygen tanks on the ISS last? Do they need replacement?
How frequently does ISS have to fill oxygen tanks?
Does the ISS ever have to be cleaned? How big can the ISS get? How is the temperature maintained inside the ISS? How big is the ISS? How is the temperature controlled at ISS? How is the ISS always airtight? How large is the International Space Station (ISS)? Theoretically, how long could a human live on the ISS? How thick is the skin of the ISS? How do astronauts breath in ISS? What will it take to keep the ISS hardware in orbit, past its operational life? Does India contribute to the ISS (International Space Station)? How long can an astronaut stay in ISS? What is the energy source of the International Space Station (ISS)? And how does it maintain its energy? How do astronauts get deliveries on the ISS? How many people are aboard the ISS at a given time? What happens everyday in the ISS (International Space Station)? What kind of experiments are conducted on the ISS? What kind of work is done on the ISS? What are the time dilation effects on the ISS? How many tons of water to airplanes carry? Should the International Space Station (ISS) always be occupied? Do astronauts sweat in ISS? What is the ISS? How does the ISS sustain a liveable environment in space? What would happen to the ISS when it is decommissioned? How was ISS sent to space? How and when ISS was send to space? How does pressurizing work in the ISS? What will eventually happen to the ISS after it is decommissioned?