Talking about her first spacewalk with Meir in October a year ago, Koch said, "We caught each other's eye and we knew that we were really honored with this opportunity to inspire so many, and just hearing our voices talk to Mission Control, knowing two female voices had never been on the loops, solving those problems together outside - it was a really special feeling".
Koch smiled and gave a thumbs-up as support crew helped her get out of the capsule and placed her in a chair for a quick post-flight check-up alongside her crewmates. Throughout Christina's mission, she accomplished 5,248 orbits of the Earth, and traveled 223 million kilometers/139 million miles, based on the BBC.
Koch's first day at the ISS was on March 14 which was a very important day for her because it was the start of her progress for humanity altogether.
During his time on the ISS, he conducted six spacewalks for a total of 33 hours and nine minutes in the vacuum of space. One reason this has not happened before is that the space station had only one spacesuit that was the right size for a woman.
However, NASA's first try at a ladies's spacewalk was canceled as a result of one among its astronauts didn't have a medium measurement house swimsuit.
Koch called three-time flyer Whitson, now 60, "a heroine of mine" and a "mentor" in the space programme after she surpassed the record.
USA astronaut Christina Koch has returned to Earth after 328 days in space aboard the International Space Station (ISS).
Joining Koch in the Soyuz capsule, according to the Associated Press, was station Commander Luca Parmitano of the European Space Agency and Russian cosmonaut Alexander Skvortsov. All three were said to be in good spirits after the landing.