Indian Air Force officer Shubhanshu Shukla, the country’s first astronaut to enter the International Space Station (ISS), has shared his first-hand experience that even simple tasks like sleeping, walking, and drinking water become very challenging in microgravity conditions.

UK astronaut Tim Peake runs the distance of the London Marathon on a treadmill in the International Space Station (ISS).

UK astronaut Tim Peake is ready to make his landmark flight to the International Space Station (ISS).

US astronaut Scott Kelly and Russian cosmonaut Mikhail Kornienko has docked for the start of a 12-month tour of duty on the International Space Station