I was outside hanging up the washing on my balcony. As I looked towards the tress I noticed a spherical object hovering? in front of the trees. It was pulsing in brightness. The object seemed to go from transparent to solid. It was very bright. No sound. It didn't seem to move laterally. just staying in one spot, the pulsing got faster and then the object disappeared. The object was about the size of a large inflatable beachball. It was observable for about 5mins. Truly weird.