Russian Soyuz spacecraft carrying NASA Astronaut Nick Hague and Christina Koch, and Cosmonaut (Russian Crew members are called as a cosmonaut) Alexey Ovchinin successfully docked International Space Station.
Soyuz is a Russian Spacecraft carries people and supplies to and from the space station. Soyuz Spacecraft also function as lifeboats and one Soyuz spacecraft is always docked to the space station, so that in case of emergency the crew can return to earth through the spacecraft.
The International Space Station is a habitable artificial satellite in low Earth orbit. The ISS maintains an orbit with an altitude of between 330 and 435 km (205 and 270 mi) by means of re-boost maneuvers and circles the Earth in roughly 92 minutes and completes 15.5 orbits per day.
The ISS serves as a microgravity and space environment research laboratory in which crew members conduct experiments in biology, human biology, Physics, Astronomy, meteorology, and other fields. The ISS programme is a joint project between five participating space agencies: NASA (United States), Roscosmos (Russia), JAXA (Japan), ESA (Europe), and CSA (Canada).