Speculation has followed the appearance of a bright flash of light over the Kyiv skyline ... sparking a light-hearted thread that includes memes and cartoons of aliens and UFOs.

The bright flash of the fireball is a result of the pressure the object incurs while entering Earth's atmosphere, he added. "Due to the great pressure on the object, they begin to flash with a ...

But this new flash's location is nowhere near where a dying star should be. A bright flash of blue light appearing in the middle of seemingly empty space has scientists confused. The brilliant ...