第二个星际物体正在穿过我们的太阳系，这一次，天文学家将准备好..。
In 2017,scientists marveled over the first human observations of an interstellar object passing through our solar system.The cigar-shaped asteroid,named'Oumuamua,possessed such bizarre traits that some observers speculated it might be an alien spaceship;most astronomers,however,focused on using the narrow timeframe of its passage to make as many observations as possible.
2017年，科学家们对人类首次观测到一个星际物体穿过我们的太阳系感到惊讶。这颗雪茄形状的小行星被命名为"奥陌陌（Oumuamua）"，它拥有如此奇特的特征，以至于一些观察者猜测它可能是外星人的宇宙飞船;然而，大多数天文学家都把注意力集中在利用它通过的狭窄时间框架来进行尽可能多的观测。
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Now astronomers believe a second interstellar object is zooming into our solar system and this time,their telescopes will be ready.
现在天文学家相信第二个星际物体正在向我们的太阳系聚焦，这一次，他们的望远镜将准备就绪。
An amateur astronomer in Crimea,Gennady Borisov,discovered what is believed to be a comet using his own observatory.The Minor Planet Center(MPC)confirmed the object,subsequently named C/2019 Q4(Borisov),and further analysis revealed it to have an unusual trajectory—an eccentric,hyperbolic path that likely means it is not gravitationally tied to our sun.
克里米亚的业余天文学家根纳迪·鲍里索夫利用自己的天文台发现了一颗据信是彗星的东西。小行星中心(MPC)确认了这个物体，随后命名为 c/2019 Q4(Borisov)，进一步的分析表明它有一个不寻常的轨道——一个偏心的、双曲线的路径，这可能意味着它与我们的太阳没有引力关系。
Like its predecessor'Oumuamua,the new interstellar visitor hails from another planetary system and is tearing through the galaxy with incredible velocity(30 kilometers a second).
就像它的前身 Oumuamua 一样，这个新的星际访客来自另一个行星系统，以难以置信的速度(每秒30公里)穿过星系。
There are differences between the objects,though.While'Oumuamua is an asteroid,the 10 kilometer wide C/2019 appears to have a tail of gas indicative of a comet.This means its composition and origins can be studied in greater detail.Additionally,and perhaps more importantly,C/2019 is six times brighter and will be available for observation for far longer.
然而，这些对象之间存在着差异。虽然 Oumuamua 是一颗小行星，但10公里宽的 c/2019似乎有一条气体尾巴，表明它是一颗彗星。这意味着可以更详细地研究它的组成和起源。此外，也许更重要的是，c/2019的亮度是它的六倍，并且可以观测更长的时间。
'Oumuamua took scientists by surprise and was on its way out of the solar system by the time they discovered it,allowing only a couple weeks of analysis.C/2019,on the other hand,will be visible to astronomers for about six months.
Oumuamua 让科学家们大吃一惊，当他们发现它的时候，它正在离开太阳系，只允许进行几个星期的分析。另一方面，c/2019对天文学家来说将持续6个月左右。
C/2019's cometary nature and the amount of time scientists will have to study it means we will get an unprecedented opportunity to learn about the condition of an alien planetary system that could be a billion years old.
C/2019的彗星特性以及科学家们研究它的时间意味着我们将获得一个前所未有的机会去了解一个可能有10亿年历史的外星系统的状况。
Olivier Hainaut,an astronomer with the European Southern Observatory,says scientists are so excited about the discovery that many are dropping all other projects to focus on it and commission high-powered telescopes for observation.
欧洲南方天文台(European Southern Observatory)的天文学家奥利维尔•海纳特(Olivier Hainaut)表示，科学家们对这一发现感到非常兴奋，以至于许多科学家放弃了所有其他项目，转而专注于此，并委托高性能望远镜。
"Here we have something that was born around another star and traveling toward us.It's the next-best thing to sending a probe to a different solar system,"Hainaut said.
"在这里，我们看到一些东西围绕着另一颗恒星诞生，向我们飞来。这是向另一个太阳系发射探测器的次佳选择，"Hainaut 说。
Someday the European Space Agency(ESA)may attempt to land a spacecraft on an interstellar object.In the meantime,scientists plan to learn more about the conditions of other parts of our vast galaxy.
有朝一日，欧洲航天局(ESA)可能会尝试在星际物体上着陆航天器。与此同时，科学家们计划进一步了解银河系其他部分的状况。
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