球状星团

The determinations of the absolute magnitude and the kinematicparameters of RR Lyrae stars, their effects on the estimations of thedistances and the ages of the globular clusters, and the comparisonsbetween the results and ones from other indicators of distances arereviewed.

对天琴RR型变星绝对星等与运动学参数的测定及其对确定距离、球状星团年龄估计的影响，并对它们和其他距离指示器求得的结果的比较作了评述。

Forexample, the absolute magnitude of RR Lyrae stars determined from thedirect and indirect measurement methods splits into fainter and brightervalues, the distance modulus of Large Magellanic Cloud and theestimate of the ages of Globular Clusters based on the RR Lyrae starsand the other indicators of distances are not fully coincided.

例如由直接和间接测定方法决定的天琴RR型变星的绝对星等分成较暗和较亮两类，由天琴RR型变星和其他距离指示器决定的大麦哲伦云的距离模数和球状星团年龄估计并不完全一致。

At first, this age-dating approach was used to estimate the age of G-dwarf stars with Th/Nd chronometry. Recently, it has been used to evaluate the age of halo field stars and globular cluster stars with the Th/Eu and U/Th chronometers.

这种方法最初是利用元素对 Th/Nd 来确定 G 矮星的年龄，近年来开始利用元素对 Th/Eu 和 U/Th 来确定晕族场星和球状星团内恒星的年龄。

This is a common sentiment among scientists. But there's a counterargument: There are a lot more ways to be dead than to be alive in this universe. In fact, when you look at all those stars in this globular cluster, you're looking at a patch of sky where life may never have taken hold.

科学家普遍有这种观点，但也有反方说法，在宇宙中比起活著还有更多结束生命的方法，事实上，当你望向这群球状星团里的所有星星，你看的是天际中一条生命无法停留的小路。

For this purpose the study of globular clusters is most instructive.

在这个问题上球状星团的研究最富有指导意义。

The third is the remote globular star cluster NGC 2419, at distance of nearly 300,000 light-years.

其中两个是附近的恒星，第三个就是距离我们30万光年之远的球状星团NGC 2419。

A collection of very odd white dwarfs have been discovered in a local globular cluster.

收集的非常奇怪的白矮星被发现在当地的球状星团。

Roughly similar to other large globular star clusters like Omega Centauri, NGC 2419 is itself intrinsically bright, but appears faint because it is so far away.

与其他大型的球状星团比如人马座的奥米茄星团相似的是，NGC 2419本身是相当亮的，只是因为过于遥远而显得黯淡。

Using the K20 eyepiece included as standard equipment, about 45x magnification, it's easy to see the Andromeda Galaxy and its smaller satellite galaxy M32. When compared to 60mm refractors, the Powerseeker 114 brings out much more detail in the Orion Nebula, reveals many more stars in Perseus' Double Cluster and even brings out a few individual stars in globular clusters like M13. Saturn looks quite small at 45x with the K20 eyepiece, but using my own 7.5mm eyepiece (120x) I can easily detect the shadow cast by the planet on the rings, and even glimpse the ring's Cassini Division. When the mirrors are properly lined up or "collimated," the images are reasonably sharp up to magnifications of 225x.

使用标准配件中的K20 目镜，可以得到45倍放大率，这时候很容易看到仙女座星系，还有较小的星系M32；和60毫米口径的折射望远镜相比，114 EQ可以看清更多猎户座星云的细节；瞄准英仙座双星团，看到的星体数量更多，显得更加壮丽；对于球状星团，比如M13，甚至可以显出其中少数独立的恒星；在K20 目镜下（放大45倍）的土星显得相当小，但换成我自己的7.5毫米焦距的目镜(得到120倍)，可以轻松的看到光环在土星上的投影，甚至可以瞥见土星光环内的卡西尼缝隙。

Packed with about 10 million stars,Omega Cenis the largest of 200 or so known globular clusters that roam thehaloof our Milky Way galaxy.

拥有大约一千万颗成员星的奥米茄星团，是我们银河系银晕大约二百个球状星团中最大的一个。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。