The SpaceX Dragon commercial cargo craft just before it was released by the International Space Station's Canadarm2 robotic arm on 18 May. Credits: ISS/Nasa

This image was taken from the Russian part of the International Space Station looking out of a viewport at the station's solar wings and the European Cupola observatory module. Credit: ISS/Nasa/Esa

A star cluster in the Flame Nebula, about 1,400 light years from Earth. Credits: X-ray: Nasa/CXC/PSU/K Getman, E Feigelson, M Kuhn and the MYStIX team; Infrared: Nasa/JPL-Caltech