Mysterious objects appeared as if a light was turned on, then gradually faded away. It was like dimming lights one by one in a sequence, all happening within 10 to 15 seconds. What could it be?

Mysterious objects appeared as if a light was turned on, then gradually faded away. It was like dimming lights one by one in a sequence, all happening within 10 to 15 seconds. What could it be?
What you’re describing sounds like it could be a variety of phenomena. If the objects appeared suddenly and then faded away sequentially, it might be related to something like lights from a spacecraft, satellites, or even reflections of sunlight off of high-altitude clouds or atmospheric particles.
In some cases, it could also be related to astronomical events, such as the movement of stars or planets, although those typically don’t behave in such a specific sequence. Another possibility is that you witnessed a drone or some other man-made object with lights.
If this was in a specific location or at a particular time, submitting a sighting report to local UFO organizations or checking local astronomy groups might yield more insight. Have you seen anything similar before, or was this a first-time experience?