We observe a slight variation in the rate of some pulsars , and this is interpreted as indicating that they are being disturbed , by having earth sized planets going round them 我们观察到一些脉冲星频率方面的微小的变化，这可解释为它们受到了围绕它们运行的地球大小的行星的干扰。
Planets going round pulsars are unlikely to have life , because any living beings would have been killed , in the supernova explosion that led to the star becoming a pulsar 围绕脉冲星运行的行星上不大可能有生命存在，因为在导致星体变成脉冲星的超新星爆炸环境中，任何生命都会被弄死。
One group is interested in mapping the distribution of hydrogen in the universe , another in the location of pulsars , and yet another is studying the structure of our galaxy , the milky way 某个小组对绘制宇宙中氢的分布图感兴趣，另一个则对定位脉冲星感兴趣，还有的在研究银河系的结构。
But , the fact that several pulsars are observed to have planets suggests that a reasonable fraction of the hundred billion stars in our galaxy may also have planets 然而，有几个脉冲星被观测到具有行星的事实提示我们，银河系中上千亿颗星星中满足某种条件的相当一部分恒星可能也具有行星。
Researchers have previously used a similar method to detect planets near a star utterly unlike the sun ; an ultradense , rapidly spinning object called a pulsar 研究者先前已用一种类似的方法测出了在一颗完全不同于太阳的恒星附近有若干行星：这颗被称为脉冲星的恒星是一种超密度的急速旋转的物体。
About two years after the discovery of the supernova explosion sn1987a , kristian et al . 1989 claimed to have discovered within this sn1987a a 0 . 5 ms optical pulsar which was disproved about one year later 在发现sn1987a超新星爆发两年后，基斯坦和他的同僚宣称他们在sn1987a内发现了一颗自转周期为0 . 5毫秒的的脉冲星。
Three other extrasolar planets believed to be of rocky composition have been reported , but they orbit a pulsar - the flashing corpse of an exploded star - rather than a normal type of star 之前人们曾报道过另外三颗据信由岩石组成的太阳系外行星，但是，它们是围绕着一颗脉冲星（恒星爆发后遗留的发光的残存物）运转的，而不是一颗常态的恒星。
