From my balcony I witnessed this pulsating blue-green object hovering, rising slightly and finally moving from Southeast to the Northeast over the Atlantic Ocean. I was able to capture a few images of the object. It traveled without sound and split into two distinct objects before moving to far away to photograph any longer. The color changed from shades of purple to blue-green and white. The outer area was emitting a glow that grew and shrank during its movement. The timing of the pulsating was not fixed, more of a random pattern.This is very similar to an object I saw last year in the same area only that sighting was over the Gulf of Mexico instead of the Atlantic.