July 23, 2015 12:29 AM EDT

Three astronauts have docked with the International Space Station and are joining three existing members on board the station for the next five months.

The three astronauts arriving at the International Space Station include American astronaut Kjell Lindgren and Japanese astronaut Kimiya Yui, who are flying for the first time. They are led by Soyuz commander Oleg Kononenko. The crew is slated to stay onboard for five months, returning on Dec. 22.

The trio will join American astronaut Scott Kelly and Russian cosmonauts Mikhail Kornienko and Gennady Padalka, who have already been in space for 117 days. They launched in the early hours of March 28.

TIME is following the yearlong mission between American astronaut Scott Kelly and Russian cosmonaut Mikhail Kornienko. Click here to watch the series, or watch Episode 1, “Leaving Home,” below.

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Write to Jonathan D. Woods at jonathan.woods@time.com.

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