Once we heard that the Halley Comet would fly back the next Saturday and was eager to observe it.

有一次我们听说哈雷彗星下一个星期六将飞回来，我急切地想看到它。

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He studied the light curves of asteroids and thus their rotation, and also studied the variable star CZ Cassiopeiae, and the evolution of the orbit of Comet Halley.

张钰哲研究小行星的光变曲线和旋转、CZ仙后座变星以及哈雷彗星轨道的变化。

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It's the most famous of all comets, comet Halley.

它是所有彗星中最有名的哈雷彗星。

youdao

That would give it an orbital period of 341 years the longest yet measured and far longer than, for example, comet Halley, which goes around the sun in a sprightly 76 years.

ECONOMIST: Comet Ikeya-Zhang is enlivening the skies

Annihilation aside, Halley's comet will damage the world economy and the environment.

ECONOMIST: Stop that comet

In 1910, after weeks of being viewed through telescopes, Halley's Comet was reported visible to the naked eye in Curacao.

CNN: Friday,