Astrophotographers often produce breathtaking images of distant galaxies, planets, and moons from Earth. But Dr Sebastain Voltmer captured something very different and yet equally incredible, last week. He photographed the International Space Station (ISS) while astronauts Matthias Maurer and Raja Chari were outside performing a spacewalk. This may be the first ground-based image that has captured two astronauts out on a spacewalk at the same time.