A replica of Russia’s Zvezda module (left) and Europe’s Columbus module (right) – both attached to the International Space Station – in ESA’s Erasmus User Centre. The centre is a showcase for the programmes and missions of the Directorate of Human Spaceflight and Operations. It advises institutional and commercial users interested in making use of the Directorate's space platforms and ground-based facilities. It is equipped with a drop tower for momentary weightlessness, interactive models, a 3D theatre and document archive.