Was followed home by a bright object in the sky

After picking up food from a drive through, my mother and I were driving home.  As we drove, I had noticed a light high up in the sky, a few miles away.  It was a beautiful white light, with hues of green and red around the edges.  At first I thought it was a star, and I pointed it out to my mother.  The sky was very clear, and it was a cold night.  There didn't seem to be many cars on the road as we drove home.  When I looked up again, I noticed that the object had moved some distance ahead of us.  Keeping my eye on it, we turned down another road.  The object slowly moved from left to right, then flew behind us, and then in front of us.  It seemed to follow us like this all the way home.  It flew very smoothly, yet seemed to be able to travel many miles relatively quickly.  Later that night as we were watching the nightly news, they reported that many others, including a police officer reported seeing the same mysterious object in the sky.