On April 8, 2025, NASA astronaut Jonny Kim and two Russian cosmonauts, Sergey Ryzhikov and Alexey Zubritsky, successfully docked with the International Space Station (ISS) aboard the Soyuz MS-27 spacecraft. The mission, which launched from Baikonur Cosmodrome in Kazakhstan, is a significant milestone in international cooperation in space exploration. This accomplishment, as reported by NASA, adds another chapter to the ongoing research aboard the ISS and demonstrates the strength of global partnerships in advancing space exploration.
Soyuz MS-27 Crew Successfully Docks with the ISS
The Soyuz spacecraft, carrying Kim, Ryzhikov, and Zubritsky, launched at 1:47 a.m. EDT on April 8 and completed the journey to the International Space Station with a successful docking at 4:57 a.m. EDT. This is a key moment in the Expedition 72 and Expedition 73 missions, which focus on scientific research and maintenance of the ISS.
The hatches between the Soyuz spacecraft and the ISS are expected to opened around 7:20 a.m. EDT, officially welcoming the crew aboard for their eight-month mission. During their stay, the astronauts will be conducting critical research experiments, supporting maintenance tasks, and contributing to the international effort to further understand microgravity and life sciences in space.

Historic Mission for Jonny Kim
This mission marks the first spaceflight for Jonny Kim, who is not only a medical doctor but also a former Navy SEAL. Kim is the first Korean-American astronaut to reach the ISS, bringing a unique skill set to the mission. His background in medicine and military service will likely contribute to NASA’s future missions as well as his international cooperation aboard the ISS.
His arrival adds a diverse and much-needed layer to NASA’s expanding astronaut roster.
For the cosmonauts, this is the third mission for Sergey Ryzhikov, who previously spent nearly a year aboard the ISS in two separate missions. Alexey Zubritsky, meanwhile, is joining his first spaceflight, marking a significant milestone in his career as well.
The Importance of the Soyuz MS-27 Mission
The Soyuz MS-27 spacecraft is a part of the ongoing efforts to keep the International Space Station operational while providing a vital platform for scientific research. The crew will assist in routine maintenance, conduct experiments, and further international research in the fields of medicine, technology, and space science. As the ISS continues to orbit Earth, the astronauts aboard work to further human understanding of how to sustain life in space and expand the possibilities for future space travel to the Moon, Mars, and beyond.
The arrival of Jonny Kim and the cosmonauts strengthens the relationship between NASA and Russia’s space agency Roscosmos, underscoring the importance of collaborative efforts in the pursuit of space exploration.
In addition to their work aboard the ISS, this mission is also significant for the ongoing space exploration program as it brings together two major space agencies, helping lay the groundwork for future projects aimed at long-duration missions on the Moon and Mars.