Soyuz TM-20 was a crewed spaceflight mission launched on December 21, 1994, as part of the Soyuz program. It transported a three-member crew to the Mir space station, marking an important step in international cooperation in space exploration. The mission lasted approximately 179 days, during which the crew conducted scientific experiments and maintenance on Mir. Soyuz TM-20 returned to Earth on June 4, 1995, successfully landing in Kazakhstan, and contributed to the ongoing research and development of long-duration space missions.