有些脉冲星表比地球上最精确的时钟还准。
Some pulsars keep time better than the Earth's most accurate clocks.
导航星库包括导航星表和星对信息表。
The guide star database consists of guide star catalogue and star pair information catalogue.
通常，察看等级越高，活动的星表越多。
As a general rule, the higher the view level, the more catalogs become "active".
为编制综合等高星表提出了一种新的方法。
Also a new method is presented for compiling the general catalogue observed with astrolabes.
在这片星空中还能看见梅西叶星表中的天体。
Also identified in the famous star field are Messier catalog objects.
软件将使用图片和星表中最亮的恒星进行匹配。
The software will use the brightest stars in the image and in the star catalogue for the matching routine.
该文简述了巡天观测和星表编制的历史和意义。
The history and significance of the sky survey and compiling catalogs are briefly described.
对影响中国古代星表数据的各种误差进行了讨论。
A discussion of several errors of the data of ancient star catalogues of China is made.
如果先前有快速星表被选中，在目录中就会有显示。
If a quick catalog has previously been selected, that catalog will be loaded and displayed.
删除之后，星表文件对后续打开的星图均不起作用。
The removed catalogs will be absent from the catalog list of all maps created after the removal operation.
你必须创建一幅新的星图才能够使用你刚刚添加的星表。
After adding a new catalog, you will need to create a new map in order to use the new catalog.
本选项将用来指定用以进行天文数据归算的参考星对应星表。
This section is used to select the source of the reference stars used during the data reduction process.
某些情况，你想要放弃默认星表并且选择你自己的数据星表。
There are situations, however, which you will wish to overrule the default catalog selections and choose for yourself which catalogs data should be read from.
选中列表中的星表名称，然后单击在对话框底部的编辑…按钮。
Highlight the catalog's name in the list, and click the Edit... button at the bottom of the dialog.
这个对话框会列出所有可用的数据星表，和它们活动等级的范围。
This dialog displays all the available data catalogs, together with their range of activation levels.
按一定规则对全天星表的星信息进行了筛选并组建了导航星星库。
The guide star catalog is built with the star information selected from all-sky star catalog on some guidelines.
目标菜单用来给星表添加星体、编辑星表详情和从星表中删除星体。
The Object menu provides options for adding a new object to the catalog, editing details of an object, or deleting selected object.
数据来源于第谷星表，100光年以外的恒星则采用非常近似的数值。
This is taken from the Tycho catalog and for stars further away than 100 light years or so should be taken as a very approximate figure.
当一个星图开始被绘制，当前的察看等级决定使用哪个星表来读取信息。
When a map is initially drawn, the current view level is used to decide which catalogs to read information from.
星表活动得越多，星图会花费更多的时间计算，而且会需要更多的内存。
The more catalogs which are active, the longer the map will take to be computed, and the more memory it will require.
如果过去没有选择快速星表或者星表文件找不到，你就会看到一个空目录。
If no quick catalog has previously been selected, or if the file for the previous catalog can't be found, an empty catalog will be displayed.
本文叙述了子午星表系统误差的主要来源，等高观测的特点及等高星表的不足之处。
In this paper, the main sources of the errors in a meridian catalog, the characteristics of the equal altitude observation and the shortages of an equal altitude catalog are described.
这是一个极其强大的工具，让天文专家们能使用他们感兴趣的更多“暗”数据星表。
This is an extremely powerful facility for astronomers with specialist interests who wish to use some of the more "obscure" data catalogs which are available.
快速星表特别设置成这样，是因为他的作用就是为了在星图上显示你想看到的星体。
This has been done deliberately, since the purpose of the quick catalog is to add objects which you want to see on the map.
仪器星等对正确评估星敏感器的灵敏度、捕获概率以及建立导航星表都有重要的意义。
Stellar instrument magnitudes are important for star trackers; however, there are not simple and accurate methods to estimate stellar instrument magnitudes.
利用这个期间的资料，初步研究了FK_4星表的系统误差和改进光行差常数等问题。
Using the data obtained during this period, the problems of determining the systematic error of FK_4 catalog and improving the constant of aberration are investigated.
所有的深空天体都有星表编号——事实上，正向我们前面看到的那样，大部分都有许多编号！
All deep sky objects have catalog Numbers - indeed, most have 'many' catalog Numbers as we've already seen!
一个已经被“禁用”的星表当然可以用这种方式继续自动被显示通过单击对话框中它的复选框。
A catalog which has been "disabled" in this way can of course still be switched on manually by clicking its check box in the catalog dialog.
在天文上，本术语指的是观测的参考星的位置(或星等)与星表上的该星的位置(或星等)的差值。
In Astrometry, the term is applied to the difference between the observed position (or magnitude) of a reference star and the position (or magnitude) listed in the star catalog.
在天文上，本术语指的是观测的参考星的位置(或星等)与星表上的该星的位置(或星等)的差值。
In Astrometry, the term is applied to the difference between the observed position (or magnitude) of a reference star and the position (or magnitude) listed in the star catalog.
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