Space Station at night

A rare view of the International Space Station at night taken by NASA astronaut Mike Hopkins. He Tweeted from space: “What it looks like inside ISS while we sleep. Dots near hatch point to Soyuz if emergency.”

Astronauts on the International Space Station have a very structured day, working 10 hours maximum followed by a sleep period of eight hours. Breakfast, lunch and dinner are at set times as well as relaxation periods, debriefings, times to communicate with family and friends, times for privacy and times for sports activities.

At night, the lights are turned off to promote rest. The green lights direct astronauts to the Soyuz spacecraft that would bring them back to Earth in case of an emergency.