quasar

简明释义

英[ˈkweɪzɑː(r)]美[ˈkweɪzɑːr]

n. [天] 类星体；恒星状球体

复 数 q u a s a r s

英英释义

单词用法

同义词

反义词

例句

1.But as matter spirals toward a black hole, some of it is blown away by the heat and light of the quasar.

但是随着物质盘旋飞向一个黑洞，它的一部分会被这个类星体的热量和光吹走。

2.As light from a quasar travels through space, it passes through clouds of gas that imprint absorption lines onto its spectrum.

当光从一个类星体划过太空，便会穿过将吸收线特征印在光谱上的气体云。

3.A single quasar can be 1,000 times brighter than an entire galaxy of 100 billion stars.

一个类星体比1000亿个恒星组成的星系还要亮1000倍。

4.This quasar lit up the nearby gas, and although the quasar has since gone out, the light from it is still travelling to the object.

该类星体点亮了附近的气体，虽然该类星体已经耗尽，但光仍在该物体中旅行。

5.The mirror, in this case, is a vast blob of gas about 70,000 light-years away from the center of a spiral galaxy, where the quasar resides.

从这种情况看，这个大家伙实质上是来自70000光年之外的星系螺旋线（宇宙射线）的视像，也即是类星体所在之处。

6.Colours for 2010 are Pearl Cool White, Pearl Siena Red, Pearl Nightstar Black and Quasar Silver Metalic.

2010年的款式色彩有珍珠冷白，Siena珍珠红，Nightstar珍珠黑和Quasar金属银。

7.This research suggests that not all supermassive black holes were formed in the quasar era.

这些研究暗示，并非所有超大质量黑洞都是在类星体时代形成。

8.That is what makes a quasar.

那就是，究竟是什么造就了一个类星体。

9.A quasar can emit energy across the entire electromagnetic spectrum.

一个类星体可以在整个电磁谱上发出能量。

10.The discovery of quasars changed our understanding of the cosmos.

对类星体的发现改变了我们对宇宙的理解。

11.The light from some quasars has taken billions of years to reach us.

一些类星体的光已经花费了数十亿年才到达我们这里。

12.The brightness of a quasar is often greater than that of entire galaxies.

一个类星体的亮度通常超过整个银河系。

13.Astronomers study quasars to understand the early universe.

天文学家研究类星体以了解早期宇宙。

作文

In the vast expanse of the universe, there exist numerous cosmic phenomena that continue to baffle and intrigue astronomers and astrophysicists alike. One such phenomenon is the quasar, which stands for 'quasi-stellar radio source.' Discovered in the 1960s, quasars are incredibly luminous objects that emit enormous amounts of energy, making them some of the brightest and most distant entities known in the universe. The term quasar refers to their star-like appearance when viewed through telescopes, despite being fundamentally different from stars.Quasars are believed to be powered by supermassive black holes at the centers of galaxies. As matter spirals into these black holes, it forms an accretion disk, heating up to extreme temperatures and emitting vast quantities of radiation across the electromagnetic spectrum. This process results in the immense brightness that characterizes quasars. In fact, a single quasar can outshine an entire galaxy, making them visible even at great distances.One of the most fascinating aspects of quasars is their distance from Earth. Many quasars are located billions of light-years away, which means we are observing them as they existed in the early universe. This provides astronomers with invaluable insights into the formation and evolution of galaxies. By studying quasars, scientists can gain a better understanding of how galaxies interacted and evolved over time, shedding light on the history of the cosmos.Furthermore, quasars play a crucial role in the field of cosmology. Their immense brightness allows them to act as beacons, illuminating the space around them and helping researchers map the distribution of matter in the universe. The light from quasars can also be used to study the intergalactic medium, the matter that exists between galaxies. By analyzing the absorption lines in the spectra of quasars, astronomers can infer the composition and density of this elusive matter.Despite their significance, there are still many unanswered questions about quasars. For instance, the exact mechanisms that drive their immense energy output remain a topic of ongoing research. Additionally, the relationship between quasars and their host galaxies is not fully understood. Some studies suggest that active galactic nuclei, which include quasars, may influence the growth and evolution of their host galaxies, while others propose that the two may evolve independently.In conclusion, quasars are remarkable astronomical objects that offer a unique window into the early universe and the processes that govern galaxy formation and evolution. Their extraordinary brightness and distance make them essential tools for cosmological research, allowing scientists to explore fundamental questions about the nature of the universe. As our observational techniques improve and new technologies emerge, the study of quasars will undoubtedly continue to yield exciting discoveries and deepen our understanding of the cosmos.

在宇宙的广阔空间中，存在着许多宇宙现象，这些现象不断使天文学家和天体物理学家感到困惑和着迷。其中一个现象就是类星体，它代表着“类星射电源”。在20世纪60年代被发现，类星体是极其明亮的天体，发出巨大的能量，使其成为已知的最亮和最遥远的实体之一。类星体一词指的是它们在望远镜下观察时呈现的星星般的外观，尽管它们与星星在本质上是截然不同的。类星体被认为是由位于星系中心的超大质量黑洞驱动的。当物质旋转进入这些黑洞时，它形成了一个吸积盘，温度升高到极端，发出大量的电磁辐射。这一过程导致了类星体的巨大亮度。事实上，一个类星体的亮度可以超过整个星系，使其即使在遥远的距离也可见。类星体的一个最迷人的方面是它们与地球的距离。许多类星体位于数十亿光年之外，这意味着我们观察到它们时，它们已经存在于早期宇宙。这为天文学家提供了宝贵的见解，了解星系的形成和演化。通过研究类星体，科学家可以更好地理解星系如何相互作用和随时间演变，从而揭示宇宙的历史。此外，类星体在宇宙学领域中发挥着至关重要的作用。它们的巨大亮度使它们能够作为灯塔，照亮周围的空间，帮助研究人员绘制物质在宇宙中的分布。类星体的光线也可以用来研究星系间介质，即星系之间存在的物质。通过分析类星体光谱中的吸收线，天文学家可以推断这种难以捉摸的物质的组成和密度。尽管类星体具有重要意义，但关于它们仍然有许多未解之谜。例如，驱动它们巨大能量输出的确切机制仍然是正在进行的研究主题。此外，类星体与其宿主星系之间的关系尚不完全清楚。一些研究表明，活动星系核，包括类星体，可能会影响其宿主星系的生长和演化，而其他研究则提出两者可能独立演化。总之，类星体是非凡的天文对象，为我们提供了一个独特的窗口，了解早期宇宙以及支配星系形成和演化的过程。它们非凡的亮度和距离使它们成为宇宙学研究的重要工具，允许科学家探索关于宇宙本质的基本问题。随着我们的观测技术的改善和新技术的出现，类星体的研究无疑将继续带来令人兴奋的发现，加深我们对宇宙的理解。