Comets are made up of frozen gases, rock and dust that orbit stars.

彗星是由冷冻的气体、岩石和绕星运转的尘土组成的。

Comets are big ol’ cosmic snowballs, made from frozen gases, rock, and dust that end up orbiting the Sun after the other planets tried throwing them at Earth and missed.

彗星是巨大的宇宙雪球， 由冻结的气体、岩石和尘埃组成，在其他行星试图将它们扔向地球但未命中后， 它们最终围绕太阳运行。