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Q: How long are the missions? A: The ISS missions, called expeditions, usually last about six months. There are three to six crewmembers on board at all times. Professional astronaut crews come from the U.S., Russia, Japan, Canada and Europe.

A visit to the ISS is like no other experience. When you reach Earth orbit you will be traveling at 17,500 miles per hour, over 250 miles above the Earth's surface and you will be weightless, floating inside your spacecraft.

The cost for CubeSat deployment from the ISS or ISS visiting vehicle is about $90,000 (FY2022) per 1 U CubeSat, meaning a 3U will cost $270,000, and a 6U $540,000. Additional deployment services can be added such as CubeSat Safety and Verification for deployment and mission operations.

A spacecraft can arrive at the space station as soon as four hours after launching from Earth. Four different cargo spacecraft deliver science, cargo and supplies: Northrop Grumman's Cygnus, SpaceX's Dragon, JAXA's HTV, and the Russian Progress.

Typically, astronauts travel to the space station via SpaceX's Crew Dragon capsule or, in the case of Russian cosmonauts, a Russian Soyuz capsule. The Soyuz was the primary form of transportation for all astronauts and cosmonauts after NASA's space shuttle program retired in 2011.

ISS crew members are listed in bold. "Time docked" refers to the spacecraft and does not always correspond to the crew. As of , 269 people from 21 countries had visited the space station, many of them multiple times.

Nine is certainly not the highest number of people ever stationed on the space lab. The record for the largest population on the ISS was set in 2009, when there were 13 people on board. The last time there were nine people on board was in 2015, during NASA astronaut Scott Kelly's "Year in Space" mission.