Sunset in orbit

NASA astronaut Karen Nyberg Tweeted this image from space during her mission on the International Space Station. The Sun is setting over a darkened Earth on 2 June 2013. Astronauts experience 16 sunsets and sunrises each day as well as moonrises and moonsets as they orbit Earth at 28 000 km/h.

Karen spend almost six months on the orbital outpost with ESA astronaut Luca Parmitano and Russian commander Fyodor Yurchikhin in 2013 performing science experiments and maintaining the Station.