At night,many people gather to watch fireworks bursting in the dark sky.

VOA: special.2010.07.02

The Evening Star is the, roughly speaking, first heavenly body that's visible in the sky as it gets dark, at least at certain times of the year.

粗略说来,昏星就是,天黑时第一个能看见的天体,至少在一年的某个时间段是这样

耶鲁公开课 - 死亡课程节选

Rockets explode to fill the dark, night sky with bright reds and blues, with yellows and greens and whites.

VOA: special.2010.07.04

Max Arthur Cohn's painting "Coal Tower" shows the dark form of a coal tower against a light sky.

VOA: special.2009.03.23

Suddenly the sky turned dark.

VOA: special.2009.02.28