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   air      cosmonauts      crew      finger      leak      major      meteorite      necessary      object      only      outer      repair      scientific      simple      slowly      small      space      speeds      tape      together  
Astronauts and on the International Space Station (ISS) have fixed a hole in the shell of its wall. The ISS is a large satellite in space that scientists live in to do experiments. The first part of it was put into in 1998. Last week, NASA alerted astronauts on the ISS that the station was leaking air. Astronaut Alexander Gerst and five other astronauts started looking for the . Mr Gerst eventually found it and quickly used a and effective way of stopping the leak - he put his over the hole. Luckily, the hole was two millimeters wide so it was not a emergency, but it did need fixing.

The hole was in a docked Russian Soyuz MS-09 spacecraft. NASA said it could have been caused by a piece of space junk or a small colliding with the spacecraft. The ISS travels at of around 28,000 kph. Even a tiny hitting it can cause a lot of damage. Flight controllers in the USA and Russia worked with the to fix the hole. The Soyuz commander, Sergey Prokopyev, used a heat-resistant "space " and a special glue to plug the hole. These are part of a " space repair kit". A NASA official said the crew on the ISS are safe after the . He said: "The crew are healthy and safe with weeks of left in the International Space Station reserves."

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