Was looking at stars in the Northern sky and saw a white sphere moving slowly towards the west and suddenly it was gone.

Was out walking my dog and looking up at the stars, I located the northern star fairy easily and then saw a solid white sphere traveling slowly from east to west. There were no blinking lights it was a solid white sphere. I tracked it across a cloudless sky for about five minutes when suddenly it came to a dead stop and vanished in the blink of an eye. I'm still baffled at how it could be there one second and gone the next.