The International Space Station has been orbiting Earth for two decades, becoming an iconic cosmic landmark where astronauts have helped establish humanity's constant presence among the stars.

The illuminated network highlights major cities connected by highways, while smaller clusters reveal towns and villages ...

The ISS has “come into its own as a very sophisticated scientific laboratory,” says retired NASA astronaut Scott Kelly, who famously spent a year in space aboard the station in 2015 and 2016.

Expedition 74 astronauts conducted science experiments, spacesuit maintenance, and spacecraft operations while the International Space Station received cargo deliveries and performed a reboost.