Shooting star

From Tardis Wiki, the free Doctor Who reference

In the 2000s, Maria Jackson pointed out a shooting star in the sky to her father Alan Jackson. She mused that it could be either space rock or a spaceship. (TV: The Lost Boy)

"Shooting star" worlds were those that, in the early days of the War in Heaven, would suddenly shoot across charts of the Spiral Politic as their relationships with history were drastically changed by the enemy. (PROSE: The Book of the War)