I was out in my 4th floor terrace drinking coffee looking at the horizon which I always do. I can see the precise airplane paths on their way or out of the airport. As I was looking towards a mountain a very bright sphere caught my attention, I first thought it was an airplane until I saw airplanes coming and going behind it (from my perspective) this bright sphere had a different path, zig zagging a bit then straight then completely off from the airplane path, it traveled from south east to south west (if that makes sense) from my left to my right. I saw a helicopter too, that was closer, that determined more or less the altitude (the sphere was way higher) and in definitely had a path... unlike a ballon which kinda always goes up, this one was going from one side to the other, at some point stopping and the resuming. It wasn't a high speed object, steady but in a weird way. stop go stop go go stop, zig zag. go go go... The sphere was glowing, I could see a mist around it. I lost it in the horizon very close to where the sun was... and it was still shinning brightly. I was very emotional, I'm always looking out there to see if I catch one... maybe this one was for real... I hope it was..