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Star cluster - Completing their 197 days in space on October 4, 2018, astronauts Andrew Feustel and Ricky Arnold and cosmonaut Oleg Artemyev took this photo of the International Space Station from their Soyuz spacecraft after undocking. 

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International Space Station - A fish-eye view of the various scientific labs the ISS carries in space.

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International Space Station - CubeSats, a type of miniaturized satellite, are deployed into orbit. 

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International Space Station - An ISS crew member storing scientific samples for later analysis.

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International Space Station - The Kounotori 4, an unmanned cargo spacecraft launched by Japan, berthing.

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International Space Station - The ISS pictured in 2000. Its first component launched into orbit in 1998.

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International Space Station - The ISS photographed in 2002 displaying more components. 

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International Space Station - By the early 2000s, the ISS was clearly taking shape. 

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International Space Station - By 2005, the ISS, in low earth orbit, had undergone considerable expansion. 

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International Space Station - The ISS with its second set of solar arrays, delivered in 2006 by the NASA space shuttle Atlantis.

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International Space Station - In 2009, the fourth and final set of solar panels had been installed. The ISS was slowly assembled over the course of a decade, through the help of various spaceflights and crews.

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International Space Station - A pressurized connecting module known as "Unity" as photographed from the Space Shuttle Endeavour.

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International Space Station - The "Destiny" laboratory interior pictured in 2001. Also known as the US Lab, this is the primary research facility for United States payloads aboard the ISS.  

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International Space Station - "Quest," the huge US Orbital Segment airlock.  

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International Space Station - Mission specialist Christer Fuglesang makes the second of three planned space walks during construction on the ISS in 2006.

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International Space Station - The primary research facility known as "Columbus," as seen in 2008.

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International Space Station - A crew member using the airlock on "Kibō," which has a sliding drawer for external experiments. 

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International Space Station - Room with a view: The ISS's extraordinary Cupola, the design of which has been compared to the Han Solo's Millennium Falcon from 'Star Wars.'

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International Space Station - The Permanent Multipurpose Module known as "Leonardo" is installed.

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International Space Station - An incredible view of ISS astronauts at work high over New Zealand. 

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International Space Station - Cosmonaut Sergey Volkov operating a manual crane, his Soyuz spacecraft docked below him.

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International Space Station - Russian solar arrays, backlit by sunset, dazzle in their brilliant luminosity. 

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International Space Station - The computer age: a bank of laptops at the ready in the ISS's US lab. 

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International Space Station - Mike Hopkins, one of the US astronauts making a rare 2013 Christmas Eve spacewalk. It was only the second Christmas Eve spacewalk in NASA history. 

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International Space Station - Sunrise breaks over the Earth's horizon, as seen from the ISS. 

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International Space Station - "Harmony," also known as Node 2, is the second of the station's node modules, pictured in 2011.

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International Space Station - The ISS floats in orbit in 2000 following its undocking from the space shuttle Atlantis.

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International Space Station - The space shuttle Atlantis in Earth orbit seen over the Bahamas just before docking for the last time with the ISS in 2011.

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International Space Station - Astronaut Andrew Feustel reenters the space station after completing a spacewalk in 2011.

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International Space Station - Astronaut Scott Parazynski performs makeshift repairs to a US solar array, which damaged itself (top left) when unfolding.

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International Space Station -

Space shuttle Endeavour, a Soyuz TMA-21, and Progress M-10M docked to the ISS—a picture of true international teamwork.

See also: The daily lives of astronauts in space.

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