美国有线新闻 CNN 人类在2017年发现的首个星际访客仍是个谜（在线收听）

Which of these scientific discoveries was confirmed in 1758? Halley's Comet, gravity, Bernoulli's Principle or penicillin.

以下哪项科学发现在1758年得到证实？哈雷彗星、引力、伯努利原理还是青霉素？

Even though Edmond Halley died in 1742, his prediction that the famous comet would return came true in 1758.

虽然爱德蒙·哈雷在1742年去世，但他关于这颗著名彗星将回归的预言在1758年实现了。

Scientists say that back in October 2017, the first interstellar object that's ever been observed flew through our solar system.

科学家表示，早在2017年10月，人类观测到的首个星际物体就飞过了我们的太阳系。

They estimated it was traveling at 196,000 miles per hour and since then it has disappeared

人们估计它以每小时19.6万英里的速度飞行，从那以后它就消失了，

but they've continued to study and try to understand it ever since.

但人们一直在继续研究并试图了解它。

At first, researchers thought it could have been a comet

起初，研究人员认为它可能是一颗彗星，

but in comparing it to another interstellar comet, this one,

但在将其与另一颗星际彗星进行比较时，

they found that the new object had a mysterious tumbling motion as it flew and that it didn't have a commentary tail.

他们发现这颗新天体在飞行时有一种神秘的翻滚运动，而且它没有彗星的尾巴。

Now there's a new theory that the pancake shaped object was part of a dwarf planet like Pluto

现在有一种新的理论认为，这个扁平状的物体是冥王星这样的矮行星的一部分，

that somehow broke off from another solar system and traveled near ours.

它以某种方式脱离了另一个太阳系，在我们附近运行。