The International Space Station's cabin pressure is holding steady after the Expedition 56 crew conducted fix work on one of two Russian Soyuz spacecraft attached to the complex.
Officials and flight controllers were continuing to monitor the situation, and the crew and the flight controllers will search for any more possible leaks. Roscosmos' Soyuz commander Sergey Prokopyev repaired the leak using epoxy placed on a gauze wipe.
On Wednesday at 23:00 UTC (19:00 EDT), flight controllers began to notice a tiny pressure leak in the ISS.
Russia's space agency Roscosmos said in a statement that "the safety and health of the crew are not threatened" following the incident.
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The next morning, the team probably woke up to some surprising (and slightly worrying) news, and all crew members went searching for the hole. "The design engineers believe it is the result of a micrometeorite", he said. With the assistance of ground control, the crew combed through the ISS, closing off modules one at a time.
They found it in the Russian Soyuz vehicle used to bring three crewmen to the station on 8 June, among them Europe's Alexander Gerst, who is set to take command of the outpost. A NASA spokesman said it was premature to speculate on whether the three might have to return to Earth early if the leak, even as small as it is, can not be stopped.
Gerst, along with USA astronaut Serena Auñón-Chancellor and Russian cosmonaut Sergei Prokopyev, are due to use the same Soyuz vehicle to return to Earth at the end of the year.
The ISS has on board three Americans, two Russians and a German, all aware that even a speck of debris can be a threat. "They travel at speeds up to 17,500 miles per hour, fast enough for a relatively small piece of orbital debris to damage a satellite or a spacecraft".