The name comes from the fact that the first quasars identified emit mostly radio energy and look much like stars 这个名字实际上来自首个被确认的类星体，它所发射的绝大部分是射电能并且看上去很像恒星。
Last september they put their plan into action when jupiter passed close to the line of sight between earth and a quasar 去年9月，当木星接近一条从某个类星体射向地球的光线路径时，他们便开始将计画付诸行动。
To do this , it will examine what happens to the beams coming from faint , distant quasars as they pass through the cosmic web 因此，该仪器需要观测昏暗遥远的类星体所发出的光线在穿过“宇宙网”时所发生的情况。
The most powerful such object is a quasar , which emits a huge amount of radio , infrared , ultraviolet , x - ray , and gamma - ray energy 这种物体多数是一个发射巨大能量（包括射电、红外线、紫外线、 x射线和伽玛射线在内）的类星体。
The quasar image scooted 1 , 300 microarcseconds across the sky ? with a 50 - microarcsecond skew , just as expected from relativistic effects 类星体在天上的影像扫过了1300微弧秒，再加上50微弧秒的歪曲，正和相对论所预期的效应一样。
Ironically , scientists used to know more about the spectra of quasars billions of light - years away than about the spectra of samples here on earth 讽刺的是，相较于地球上的光谱样本，科学家反而更了解位在数十亿光年远处的类星体光谱。
We needed high - precision laboratory measurements against which to compare the quasar spectra , so we persuaded experimenters to undertake them 我们需要有实验室中的高精密量测，以比较类星体的光谱，因此我们劝说了实验学家从事此项实验。
Candidates for more massive black holes were first provided by the active galactic nuclei and quasars , discovered by radioastronomers in the 1960s 活跃的银河核和类星体首先提供了更多质量庞大的黑洞候选者,在1960年无线天文学家发现了它们。
" we can also try to determine whether the same physical laws applied in the distant past because we see quasars as they were long ago , " he said “同时我们可以确认相同的物理定律是否适用于远古时期，因为我们所看见的是很久以前的类星体， ”他说。
Also , vsop cannot frequently change observing object , hence it cannot supply more observations to many quasars , which are required for geodesy and geodynamics Vsop还不适合于频繁改变观测对象,所以无法提供针对多个射电源的观测量,而这正是大地测量和地球动力学所需要的。
