行星状星云

The best "city planetaries" in Ling's list that are larger than 15 arcseconds across and brighter than magnitude 10.0 are not widely known: NGC 1535 in Eridanus, NGC 3242 in Hydra, and NGC 6826 in Cygnus.

在林的星表中，最佳的"城市行星状星云"是大于15弧分、亮于10等的，鲜为人知的：位于波江座的NGC 1535，长蛇座的NGC 3242和天鹅座的NGC 6826。

Location of the planetary nebulae in the outskirts of the giant galaxy Messier 87 and in the intergalactic space around the centre of the Virgo Cluster of galaxies.

图中标出了位于巨椭圆星系M87外晕远处的和位于室女座星系团中心的星系间空间中的行星状星云。

The team used FLAMES, the super-efficient spectrograph at ESO's Very Large Telescope at the Paranal Observatory in Chile, to make ultra-precise measurements of a host of planetary nebulae in the outskirts of Messier 87 and in the intergalactic space within the Virgo Cluster of galaxies, to which Messier 87 belongs.

研究团队使用FLAMES——VLT阵列中的超高效摄谱仪，极为精确的测量了M87外缘和室女座星系团星系间空间中的行星状星云。

Glowing like a multi-faceted jewel, the planetary nebula IC 418 lies about 2,000 light-years from Earth in the direction of the constellation Lepus.

像一颗精心雕琢的宝石，行星状星云IC 418坐落在距地球2，000光年的天兔座内。

It is one of the best examples of a planetary nebula and a favorite target of amateur astronomers.

它是行星状星云的最好范例之一，也是业余天文爱好者最喜欢观测的目标之一。

Moreover, planetary nebulae are representative of the stellar population in general.

进一步，星系中的行星状星云数量比例是相对确定的。

This high speed wind appears to be concentrated into opposing supersonic funnels, and produces the elongated shapes in the early development of planetary nebulas BD+30-3639 appears spherical, but other observations indicate that it is viewed along the pole.

高速风似乎集中于对面的超音速漏斗状结构中，并在行星状星云演化的早期造就了拉伸的外观。（BD+30-3639看起来呈球形，但其他观测表明，我们是在从极区观看它。

Of course , in this well-studied example of a planetary nebula , the glowing material does not come from planets .

当然，在这个被细致地研究过的行星状星云样本中，炽热的物质并非来自行星，而是一颗正在死亡的太阳型恒星向外扩散的气壳。

"Butterfly"-shaped object is a planetary nebula, extending the length of this structure is about 3,800 light-years.

&蝴 蝶&状天体是一个行星状星云，这个结构延伸长度大约是 3800 光年。

This famous object is a so-called planetary nebula that represents a phase of stellar evolution that the Sun should experience several billion years from now.

这个著名的天体之所以被叫做行星状星云是因为其代表了一个行星进化的阶段，就好比太阳形成至今几十亿年间所经历过的。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了