SN 1987A - Exciting Physics

Observing the evolution of a supernova over several decades is unique. SN~1987A is the only object where this has been possible in great detail and it has shown us some physics, which we never had expected. Even now - after 10000 days - does SN~1987A provide new surprises on its way to become a supernova remnant. We present here an overview of the current status of the observations of SN~1987A with a focus on the evolution of the emission from the circumstellar ring. SN~1987A can be detected at all electromagnetic wavelengths, which gives us a complete picture of the energy sources and some of the radiation transfer. There are several emission sites present in SN~1987A and we will present them in this overview