Expedition 54 was a mission to the International Space Station (ISS) that launched on December 17, 2017. The crew consisted of three astronauts: Alexander Gerst from Germany, Serena Auñón-Chancellor from the United States, and Oleg Kononenko from Russia. Their primary objectives included conducting scientific research and performing maintenance on the ISS. During their time aboard, the crew worked on various experiments in fields such as biology, physics, and Earth science. They also participated in educational outreach activities to engage students and the public in space exploration. Expedition 54 concluded with a safe return to Earth on June 3, 2018.