comet

/ˈkɑmət/

(astronomy) a relatively small extraterrestrial body consisting of a frozen mass that travels around the sun in a highly elliptical orbit

中文释义：彗星

The comet will be visible to the naked eye next month.

下个月这颗彗星将肉眼可见。

Scientists study comets to learn about the early solar system.

科学家研究彗星以了解早期太阳系。