Huge globe which changed colors, and moved incredibly quickly, but silently.

Four of us were traveling south on the Florida Turnpike at night, from FSU. One was a math major, one a criminology major, I was a special education major (now an RN), and I don't remember what the other was majoring in. We were all women in our early 20's.  We were far from any population centers, no lights from towns or rest stops, when we spotted an orange globe, or sphere hovering motionless in the sky. At first, I thought it was a Union 76 ball, but immediately realized that there was no gas station around, and the thing was so huge, that I knew it wasn't a logo. It was orange, but then changed to red, then dark red, back to orange, to yellow, to pale yellow, then to white, and back to yellow, orange, red, and so forth. We started to pull over to get a better look at it, and it took off straight up. It moved so fast that it couldn't be followed with the eye. It seemed to leave a trail as it passed through some part of the sky, maybe as it went through some thin clouds. I'm not sure about why it left a short trail at one point, only that it did. It paused, was stationary for a few moments, then disappeared. It didn't "fly away", it was just there one second and gone the next. The whole episode lasted maybe 5 minutes at the most. I had never seen anything like that before, and haven't seen anything like it since. Even after 30 years or so, the thing is burned into my memory. Are there any other reports like this one? Oh, and it was completely silent, as far as we could tell.
Date is approximate.  PD