I will present new results on the nearby SN 1987A based on 17 years of monitoring with the Hubble Space Telescope. Our analysis has revealed that the flux from the ejecta declined up to around year 2001, but then started to increase, reaching a flux that is more than twice as high in 2010. While the declining phase is well described by radioactive decay of 44Ti, a new energy source is needed to explain the late time brightening. I will argue that this energy source is most probably X-ray radiation produced in the interaction with the circumstellar medium. The change of the dominant energy source marks the start of a new phase in the life of SN 1987 as a supernova remnant.
