Ok this is certainly way off topic but I have to share this experience with you folks.
Flying last night at 39000 feet, it was a clear night and we were heading eastbound (heading 095) at the time. At approximately 12 o'clock ( straight ahead) high, in fact very high, I would guestimate way outside the atmosphere a light appeared and progressively got brighter. Way brighter and much larger while moving from right to left. The object became about 4-5 times brighter than it first started then suddenly disappeared.
Now I'll say that I've been flying 30 years and have seen many times meteors entering the earths atmosphere and burning up, I've seen 10's if not hundreds of satellites but this thing was completely different.
Meteors falling make a reddish/yellowish light which has somewhat of a tail but this was completely round and brilliant white. It's luminosity and size were increasing in intensity and size and then it suddenly disappeared.
Satellites have a tendency to also reflect sunlight and seem like bright objects however since it was night and we were heading eastbound (sun is rising ahead of us) it would be impossible for a satellite to reflect the sun towards our direction nor with such intensity as this object had.
The only way I could possibly justify this sighting is perhaps a very large meteor halling with an entry trajectory directly towards us so it's tail wasn't visible from our position but it certainly had a brightness and brilliant white glow like I've never seen before.
Even the way it disappeared is not common to a meteor falling. Those have a tendency to glow then gradually extinguish (fade) as they break up entering the atmosphere. This thing just switched off without any fading and it was certainly way bigger than anything I've ever seen in all my years of flying.
My co-pilot was equally baffled by what we both clearly saw