redshift

简明释义

英[ˈredʃɪft]美[ˈredʃɪft]

n. [天] 红移；红向移动

英英释义

单词用法

同义词

反义词

例句

1.When the array periodicity increases, the reflectance spectrum exhibits a large redshift regularly.

当阵列周期增加，反射光谱中出现有规律地红移。

2.It's sort of pioneering in many ways, because doing this kind of detailed study of a galaxy at a very high redshift is extremely difficult.

AndrewBenson说，“从多方面看，这都是一种开创，因为对具有高红移的星系做这种详细的研究是非常困难的。”

3.The universe as it appears today is redshift 0. Redshift 1 refers to when the universe was half its present age.

当宇宙为目前一半的年龄时的红移值为1。

4.The film has obvious redshift phenomenon and its euphotic rate reduces with the increases of the number of coating layer.

镀膜层数增加，薄膜有明显红移现象并且透光率会降低。

5.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。

6.Redshift refers to what happens when light seen coming from an object is proportionally shifted to appear more red.

红移是指当一个天体发出的光线看起来成比例地更偏向红色。

7.The object's apparent brightness yields the distance; its redshift yields the velocity.

这些天体的视亮度可以得到距离，它们的红移可以得出速度。

8.In this paper a statistical investigation has been made on the redshift-magnitude relation of quasars with radio components structure.

本文对有射电子源结构类星体的红移、视星等关系进行了统计研究。

9.Astronomers measure the redshift 红移 of distant galaxies to determine how fast they are moving away from us.

天文学家测量遥远星系的红移 红移以确定它们远离我们的速度。

10.The redshift 红移 observed in the light from stars indicates that the universe is expanding.

从恒星发出的光中观察到的红移 红移表明宇宙正在膨胀。

11.By analyzing the redshift 红移 data, scientists can infer the distance of celestial objects.

通过分析红移 红移数据，科学家可以推断天体的距离。

12.The redshift 红移 phenomenon is a key piece of evidence for the Big Bang theory.

这一红移 红移现象是大爆炸理论的关键证据之一。

13.In cosmology, the redshift 红移 is used to measure the rate of expansion of the universe.

在宇宙学中，红移 红移用于测量宇宙的膨胀速率。

作文

In the vast expanse of the universe, astronomers have long been fascinated by the light emitted from distant celestial objects. One of the most intriguing phenomena they observe is known as redshift. This term refers to the way light waves stretch as an object moves away from the observer, resulting in a shift towards the red end of the spectrum. Understanding redshift is crucial for interpreting the dynamics of our universe and the movement of galaxies. The concept of redshift can be explained through the Doppler effect, which describes how the frequency of waves changes based on the relative motion of the source and the observer. When an object in space, such as a galaxy, is moving away from us, the light it emits stretches out, causing the wavelengths to become longer. This elongation of wavelengths pushes the light towards the red part of the spectrum, hence the name redshift. Conversely, if an object is moving towards us, the light waves compress, resulting in a shift towards the blue end of the spectrum, known as blueshift. The significance of redshift extends beyond mere observation; it serves as a vital tool for astronomers to measure the speed at which galaxies are receding from us. Edwin Hubble's groundbreaking work in the early 20th century revealed that most galaxies are moving away from Earth, leading to the formulation of Hubble's Law. This law states that the farther away a galaxy is, the faster it is moving away from us, a relationship that is directly proportional to its distance. By analyzing the redshift of light from these galaxies, astronomers can calculate their velocities and distances, thus providing insights into the expansion of the universe. Moreover, redshift also plays a crucial role in understanding the Big Bang theory. The discovery that the universe is expanding implies that it was once much smaller and denser. As the universe continues to expand, light from the earliest stars and galaxies has been stretched over billions of years, resulting in significant redshift. Observations of this ancient light, known as cosmic microwave background radiation, confirm the predictions of the Big Bang model and provide a glimpse into the universe's infancy. In addition to its cosmological implications, redshift is also relevant in the study of dark energy, a mysterious force driving the accelerated expansion of the universe. By examining the redshift of distant supernovae, scientists have gathered evidence that supports the existence of dark energy, which constitutes a significant portion of the universe's total energy density. This ongoing research aims to unravel the complexities of the universe's expansion and the forces that govern it. In summary, redshift is a fundamental concept in astrophysics that provides critical insights into the movement of galaxies, the expansion of the universe, and the nature of dark energy. By observing the redshift of light from distant celestial objects, astronomers can piece together the history of the cosmos and deepen our understanding of the universe we inhabit. As technology advances and telescopes become increasingly sophisticated, the study of redshift will undoubtedly continue to illuminate the mysteries of the universe and our place within it.

在宇宙的广袤空间中，天文学家们长期以来一直对来自遥远天体发出的光线感到着迷。他们观察到的最引人入胜的现象之一被称为红移。这个术语指的是当物体远离观察者时，光波伸展的方式，导致光谱向红色端偏移。理解红移对于解读我们宇宙的动态和星系的运动至关重要。 红移的概念可以通过多普勒效应来解释，该效应描述了波的频率如何根据源和观察者的相对运动而变化。当太空中的一个物体，比如一个星系，远离我们移动时，它发出的光被拉长，导致波长变得更长。这种波长的延长将光推向光谱的红色部分，因此得名红移。相反，如果一个物体朝我们移动，光波会压缩，导致光谱向蓝色端偏移，这被称为蓝移。 红移的重要性不仅仅在于观察；它作为天文学家测量星系远离我们的速度的重要工具。埃德温·哈勃在20世纪初的开创性工作揭示，大多数星系都在远离地球，从而形成了哈勃定律。该定律指出，星系距离越远，远离我们的速度越快，这一关系与其距离成正比。通过分析这些星系的红移，天文学家可以计算出它们的速度和距离，从而提供关于宇宙扩张的见解。 此外，红移在理解大爆炸理论中也起着至关重要的作用。发现宇宙正在扩张意味着它曾经要小得多且密度更高。随着宇宙的持续扩张，来自最早的恒星和星系的光经过数十亿年的时间被拉伸，导致显著的红移。对这种古老光线的观察，即宇宙微波背景辐射，证实了大爆炸模型的预测，并提供了对宇宙幼年期的瞥见。 除了其宇宙学意义外，红移在研究暗能量方面也很重要，暗能量是一种神秘的力量，推动着宇宙的加速扩张。通过检查遥远超新星的红移，科学家们收集了支持暗能量存在的证据，而暗能量构成了宇宙总能量密度的一个重要部分。这项持续的研究旨在解开宇宙扩张及其驱动力量的复杂性。 总之，红移是天体物理学中的一个基本概念，为星系的运动、宇宙的扩张以及暗能量的性质提供了关键见解。通过观察来自遥远天体的光的红移，天文学家可以拼凑出宇宙的历史，加深我们对所居住宇宙的理解。随着技术的进步和望远镜的日益精密，对红移的研究无疑将继续揭示宇宙的奥秘以及我们在其中的位置。