However, the amount of helium in the universe, as measured by spectroscopy, suggests that there are far more baryons in the universe than estimates based on galactic luminosity indicate.
然而，通过光谱学测量，宇宙中氦的数量表明，宇宙中重子的数量要比基于星系光度所估计的要多得多。
Specifically, luminosity is proportional to radius squared.
具体来说，光度与半径的平方呈正比。
FocusBlur: Makes an image out of focus with luminosity and depth.
FocusBlur：通过亮度和深度使图像失焦。
These are important because they produce regular pulses of light and the period of those pulses is precisely related to the luminosity of the star.
其之所以重要是因为它们发出有规律的光脉冲，而且这些脉冲的周期与该星的亮度精确对应。
A complete MK designation includes both spectral type and luminosity class -for instance, the sun is a G2V.
一个完整的MK系统代号包含光谱类型和光度型两部分——例如，太阳属于G 2 V类恒星。
If luminosity were a true indicator of mass, most of the mass would be concentrated toward the center.
如果亮度标志着质量，那么大部分质量就应该集中在星系的中心。
It has been known for some time that outside the bright nucleus of a typical spiral galaxy luminosity falls off rapidly with distance from the center.
我们曾经认为在典型螺旋星系的明亮中心以外，亮度随距中心距离的增加而急剧减弱。
When the Sun first became a main sequence star, it radiated only 70% of the current luminosity.
当太阳首次成为主序星，它的辐射只有当前光度的70％。
Create a new layer once again and paint the mountains in the foreground without forgetting to regulate the luminosity of the color.
再次创建一个新的图层，绘制出前景的山脉，别忘了调整颜色的亮度。
In this situation astronomers tacitly assume that stars of the same luminosity and color all have the same mass.
在目前的状况下，天文学家心照不宣地默认，光度和颜色都相同的恒星具有相同的质量。
In this paper, we investigate the relation between the redshift distribution and the luminosity function of extragalactic objects.
在本文中，我们研究河外天体的红移分布和它们的光度函数之间的关系。
The test and calibration of the detectors of the BES luminosity monitor were performed at KEK Japan.
北京谱仪亮度监测器的探测器在日本KEK进行了束流测试和刻度。
With the data of 321 pulsars the Galactic distribution and luminosity function of pulsars have been investigated.
利用迄今得到的321个脉冲星的资料，研究了脉冲星的光度函数和在银河系内的分布。
The mercury content of esculent fresh water fishes produced from Shanghai was determined by means of the cold atomic absorption luminosity.
以上海地区出产的食用淡水鱼为试样，通过冷原子吸收光度法检测鱼体中的汞含量。
According to a multitude of researches inside and outside China, classification, formation, properties of micelle and its application in luminosity analysis are inducted and commented.
根据国内外大量的研究，对胶束的分类、形成、特性及其在光度分析中的应用作了归纳和评述。
This paper reviews the progress on studies of the cosmic evolution of the luminosity function of optically selected quasars.
本文评述了光学选类星体光度函数演化的研究方面取得的进展。
Based on the chroma theory, an estimating system of the qualities of the chroma and luminosity of the LCD optical engine and the mathematic model are established.
研究了色度学原理并结合光学引擎的结构，构建了LCD光学引擎色度光度品质评价体系以及数学分析模型。
We devised a set device for measuring luminosity of LED module.
本课题的目的是研制一套用于LED显示模块亮度的测试系统。
Astronomers describe star brightness in terms of magnitude and luminosity.
天文学家用星等和光度来描述恒星的亮度。
And Grunwald says overall luminosity - an issue with the first generation of LED lighting solutions - has also drastically improved.
格伦·沃尔德说，LED照明方案第一代存在的问题——整体亮度也有了大幅度的改善。
Our present understanding of the Sun's luminosity holds that it should have progressively increased, not decreased, over the course of Earth's history.
当前我们对太阳光度的认知是：在地球的历史进程上，太阳光度应该是逐渐增加而不是减少的。
The flux dosage and calcination temperature, which affect luminosity of the fluorescent powder, are the major controlling factors.
激活剂用量和煅烧温度影响荧光粉的发光亮度，是主要控制因素。
A luminosity function is the number of objects of a particular sort as a function of their luminosity or brightness in some wavelength band.
光度函数是作为某一波段的光度或亮度的函数的特定种类的天体数目。
Stars are also classified by their luminosity under the Morgan-Keenan system.
恒星在MK系统下，也经常根据光度分类。
In principle, one can trace that history back in cosmic time by observing a so-called standard candle, a class of astronomical object whose intrinsic luminosity is uniform.
原理上，我们可以通过观测所谓的标准烛光(一种天体，它的绝对光度是相同的)来追溯宇宙内的历史。
On the histograms of their redshift, optical luminosity and average optical X-ray spectral index, it is found that X-ray selected quasars are distributed at the low ends of plots of these parameters.
发现在它们的红移、光学光度以及平均光学-X射线谱指数的直方分布图上，X射线选择类星体统计上都分布在这些参数图的低端。
For a few years its luminosity flared up to about 10,000 times the present-day luminosity of the Sun.
有几年它的亮度一度达到了现在的太阳亮度的一万倍左右。
We discussed the relations between the cross-sections in tree level (and one-loop corrected cross sections) and center-mass energy in the luminosity measuring ranges of GLC.
我们还讨论了在GLC的亮度监测范围内树图及一圈修正后的总截面随质心能量的变化关系。
We discussed the relations between the cross-sections in tree level (and one-loop corrected cross sections) and center-mass energy in the luminosity measuring ranges of GLC.
我们还讨论了在GLC的亮度监测范围内树图及一圈修正后的总截面随质心能量的变化关系。
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