A metallic sphere stationary/hovering above my car and was visible through my front windshield and my sunroof which was open.

A metallic sphere hovering somewhat low in the sky that I could drive under it and pass it.   It was on a overcast cloudy day with low clouds and the metallic sphere hovered not far below from the already low clouds. The background was similar to the metallic color of the sphere, dull grey. The sphere had a dull grey color but also was reflective. I could see some sort of thin layer of heat radiating from the craft hugging it. The sphere did not maneuver around as I was seeing it but a few seconds after spotting it disappeared after I drove under some thick trees that blocked the sky. I was driving the whole time this happened and it only lasted a few seconds. I had a good enough look at it to know that it wasn’t a balloon of some sort.