美国有线新闻 CNN 来自外星人的问候? 加拿大侦测到外太空重复电波

 

What do the names Whirlpool, Black Eye, and Sombrero all have in common? Are they all appliance brands, names of galaxies¹, special ops forces, or oceanic reefs? These are all the names of galaxies, massive concentration of stars.

AZUZ: Of course, the one we live in is the Milky² Way, which would have made that question too easy. And scientists say they have detected some sort of signal from outside it, fast radio bursts that repeat. Radio bursts, which are signals that only last for a millisecond or so, aren't that rare in space. But researchers say that last summer, a Canadian radio telescope recorded a burst six times from the same location, and that is said to be unusual.

This is only the second time that this type of signal has been found to repeat. So, what is it? No one knows.

Some people think they could be a form of communication from extraterrestrial life tr?ying to contact us. But scientists say that's probably not it. The bursts could come from neutron³ stars or a black hole. What they're hoping is to record more of them so they can be studied and used to explain their origin.

1 galaxies   

星系( galaxy的名词复数 )； 银河系； 一群（杰出或著名的人物）

参考例句：

• Quasars are the highly energetic cores of distant galaxies. 类星体是遥远星系的极为活跃的核心体。
• We still don't know how many galaxies there are in the universe. 我们还不知道宇宙中有多少个星系。

2 milky   

adj.牛奶的，多奶的；乳白色的

参考例句：

• Alexander always has milky coffee at lunchtime.亚历山大总是在午餐时喝掺奶的咖啡。
• I like a hot milky drink at bedtime.我喜欢睡前喝杯热奶饮料。

3 neutron   

n.中子

参考例句：

• Neutron is neutral and slightly heavier than the proton.中子是中性的，比质子略重。
• Based on the neutron energy,the value of weighting factor was given.根据中子能量给出了相应的辐射权重因子的数值。