comet wine
(彗星出现年酿造的)醇美的葡萄酒

Halley's comet
哈雷慧星

comet finder [seeker
观察彗星用的一种望远镜， 寻彗镜

If I had binoculars, I could see that comet clearly
如果我有望远镜，我就可以清楚地看见那颗彗星。

That comet is invisible to the unaided eye
那颗彗星只用肉眼是看不到的。

A comet is at perihelion when it is closest (=very close) to the sun
彗星最接近太阳时，它就是在近日点。

The comet's ice, heated by the sun, rapidly and spectacular sublimate to gas
彗星上的冰块在太阳热的作用下迅速而壮观地升华成气体。