 Cancer is the second most deadly disease all over the world. However, reliable, fast and early diagnostics can help to fight cancer and save lives. In our project 3D CancerSpec, the research center in ESPEC Potsdam in Germany and the optics company Windlight Systems in France will join forces to transfer technology from astronomy to medicine. The superb technology developed for the innovative MUSE imaging spectrograph on ESO's very large telescope is now being further developed to become an optical diagnostics tool for clinical studies. The MUSE technology, made to dissect galaxies and find out of what they are made of, will be used to distinguish in real time healthy tissue from cancerous tissue, a long-awaited tool for medical doctors.