The 2017 Nobel Prize in Physics was awarded for the recent discovery of gravitational waves, which were already predicted by Einstein one hundred years ago. Researchers all over the world collaborate to observe these ripples in spacetime with instruments spanning multiple kilometers in size. Although gravitational waves often result from a truly large astronomical event like the collision of two black holes, they only have very small measurable effects by the time they reach us on earth. This is why quantum physics, concerned with the very small, plays a huge role in detecting gravitational waves. In order to understand such large scale phenomena, we first need to understand the physics of measurement on a quantum level. Let Stina Scheer, researcher for Gravitational Physics, take you on an inspiring journey through modern physics and the two most prominent areas of today's state-of-the-art research.