For the better part of half a decade, Russian cosmonauts have been searching for the small leaks like a proverbial needle in ...

A Russian Progress cargo ship undocked from the International Space Station early Monday, taking with it the two-decades-old Pirs airlock and docking compartment to clear the way for Thursday's ...

A heavyweight Russian laboratory module that experienced a variety of problems after launch last week docked at the International Space Station on Thursday. But in a moment of unexpected drama, ...

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Two cosmonauts floated outside the International Space Station early Wednesday to wrap up preparations for detaching the two-decades-old Pirs airlock and docking compartment next month, clearing the ...