The US space agency said that after completing a record-breaking 288-day long mission NASA astronaut Peggy Whitson is set to depart the ISS and return to Earth. Whitson, along with fellow Expedition 52 Flight Engineer Jack Fischer of NASA and Commander Fyodor Yurchikhin of the Russian space agency Roscosmos will undock their Soyuz MS-04 spacecraft from the space station and land in Kazakhstan at 9:22 pm EDT.