They also used it to find an unusual kind of star system, a binary pulsar, in 1967.

1967年，科学家还用该望远镜找到了一个罕见的恒星系统，即脉冲双星。

These binary pulsars afford a second set of identifiers: the orbital period of the system, which does not change over billions of years.

这种系统的轨道周期在数十亿年内都不会改变。

Arecibo facilitated some of the most exciting astronomical discoveries of our age, including the Nobel-prize winning observation of binary pulsars providing the first evidence of gravitational waves.

阿雷西博促进了我们这个时代一些最令人兴奋的天文学发现，包括获得诺贝尔奖的双脉冲星观测， 提供了引力波的第一个证据。