A metallic sphere that was reflective and possibly had glass/window was visible and then without moving disappeared.

I was driving south on the road at not a fast speed. A metallic silver sphere that was reflective appeared at about a 75 degree angle and was clear enough to see detail but I could not estimate the distance in the sky though had a clear visibility and could see enough detail to see that only the top half of the sphere was showing, there seemed to be no bottom half but it seemed like the top of something and I could only see the top which seemed like a bubble with possibly a window because the silver metallic material was different that the front what seemed like window. The silver was reflective and it was a completely clear day with very blue sky and no clouds whatsoever. It was visible clearly for about 5 seconds and I continuously was looking at it and without moving it disappeared completely taken over by the blue sky as if it was never there. The object was completely stationary and did not move.