Glowing sphere moving much faster than any aircraft I've seen near that altitude.I went out to have a cigarette and I saw a glowing white circle of light very high up that was glowing brighter than most of the stars in the sky, it was moving much faster than any aircraft I've seen near that altitude. It was moving North to South when I first noticed it and after about 30-45 seconds it immediately changed direction heading East South East and appeared to be increasing in altitude. There were no flashing lights, it slowly got smaller until it dimmed out and I couldn't see it anymore leading me to believe it was increasing in altitude. I decided to report it because I haven't seen aircraft quite that high up and the closest to that altitude that I have seen them the flashing lights were always clearly visible and this was just glowing white.