Soyuz 27 was a crewed spaceflight mission launched on January 10, 1978, as part of the Soyuz program. The mission's primary objective was to transport two cosmonauts, Viktor Gorbatko and Yuri Malyshev, to the Salyut 7 space station, where they conducted scientific experiments and performed maintenance tasks. The mission lasted for about 7 days, with the crew returning to Earth on January 17, 1978. Soyuz 27 was notable for its successful docking with the space station and contributed valuable data to the ongoing research in microgravity environments.