The challenge of the geodesy group is to monitor planet Earth from a geometrical and physical perspective. We detect when ice sheets are melting, how vehicles move, or how infrastructure changes due to natural or man-made causes. We do this by developing new observation techniques, where space technology plays an important role. In general, geodesists are experts in observation science, data analytics, and know how to work with big data. Geodesy is essential for all the engineering sciences, and we collaborate closely with industry (energy, infrastructure, transport, water, construction), government (security and safety), and with other scientific disciplines (climate, environment, computational science).