望远镜捕捉到了一个奇特的彗星状天体在夜空中移动。

The telescope captured a peculiar ___cometary object moving across the night sky.

他的事业如彗星般迅速崛起又陨落，在耀眼夺目后突然消逝。

His career had a ___cometary rise and fall, dazzling everyone before vanishing abruptly.