ESA's Columbus space laboratory in 2014 during ESA astronaut Alexander Gerst's six-month Blue Dot mission on the International Space Station.
Alexander sent this picture with the comment: "Our powerful European science lab in space. What we investigate here cannot be done anywhere on Earth!"
Read more about the Blue Dot mission at http://www.esa.int/Our_Activities/Human_Spaceflight/Blue_dot
Follow Alexander here: http://alexandergerst.esa.int/