supernovae

简明释义

英[ˈsuːpənəʊviː]美[ˈsʊpərˈnovə]

n. 超新星（supernova 的复数）

英英释义

单词用法

同义词

反义词

例句

1.They originate from various events (supernovae and so on) within the Milky Way galaxy that is home to the Earth.

它们可以从地球所在的银河系中很多的事件里产生，如超新星事件等。

2.One particular sort, though, known as type Ia supernovae, always explode with about the same energy and are therefore equally bright.

不过，有一类被称为Ia型的超新星爆炸时释放的能量始终基本相同，因此量度也相同。

3.Unlike most supernovae, this one spewed lots of elements far heavier than iron, including radioactive thorium and uranium.

这颗晕星不同于大多数超新星，它吐出的许多元素比铁还重，其中包括放射性钍和铀。

4.Over the last 100 years, at least nine supernovae, the death explosions of massive stars, were discovered in NGC 6946.

最近100年来，至少有九颗超新星(大质量恒星爆炸的形成物)在NGC6946中被发现。

5.The research teams raced to map the Universe by locating the most distant supernovae.

研究队伍用定位距离地球最远的超新星的办法来绘制宇宙地图。

6."For one, the Hubble Space Telescope has weighed in on dark energy by virtue of the measurements of supernovae," he said.

“例如，在超新星测量方面具有优势的哈勃太空望远镜已被用于暗能量项目，”他说。

7.The discovery of distant supernovae has helped scientists understand dark energy.

对遥远的超新星的发现帮助科学家理解暗能量。

8.In 1987, the closest observed supernova to Earth was SN 1987A.

1987年，离地球最近的观测到的超新星是SN 1987A。

9.The remnants of supernovae can form new stars and planets over time.

超新星的残骸可以随着时间的推移形成新的恒星和行星。

10.Astronomers study the light emitted by supernovae to learn about the universe's expansion.

天文学家研究超新星发出的光，以了解宇宙的扩张。

11.Some supernovae can outshine entire galaxies for a brief period.

一些超新星在短时间内可以比整个星系更明亮。

作文

The universe is a vast and mysterious place, filled with wonders that continue to baffle scientists and astronomers alike. One of the most spectacular phenomena in the cosmos is the occurrence of supernovae, which are powerful explosions that mark the death throes of massive stars. These stellar events not only illuminate the night sky but also play a crucial role in the evolution of galaxies and the distribution of elements throughout the universe.A supernova occurs when a star exhausts its nuclear fuel and can no longer support itself against gravitational collapse. This process leads to a dramatic increase in brightness, often outshining entire galaxies for a brief period. There are two primary types of supernovae: Type I and Type II. Type I supernovae occur in binary systems where a white dwarf steals material from a companion star, eventually triggering a thermonuclear explosion. On the other hand, Type II supernovae happen when a massive star, having run out of nuclear fuel, collapses under its own gravity, leading to an explosive release of energy.The energy released during a supernova is staggering, equivalent to the total energy emitted by the Sun over its entire lifetime, all released in a matter of days or weeks. This immense energy disperses heavy elements such as iron, nickel, and other metals into space, enriching the interstellar medium. These elements are essential for the formation of new stars, planets, and even life itself. Thus, supernovae are not just cosmic fireworks; they are vital contributors to the chemical evolution of the universe.Observing supernovae has significant implications for our understanding of the universe's expansion. The discovery of distant Type Ia supernovae in the late 1990s led to the groundbreaking conclusion that the universe is not only expanding but doing so at an accelerating rate. This finding has profound implications for cosmology and has led to the concept of dark energy, a mysterious force driving this acceleration.In addition to their scientific importance, supernovae have also captured the imagination of artists and storytellers throughout history. They symbolize transformation and renewal, reflecting the cycle of life and death in the universe. The bright flash of a supernova can serve as a metaphor for hope and rebirth, reminding us of the beauty that can emerge from destruction.In conclusion, supernovae are more than just astronomical events; they are pivotal moments in the life cycle of stars that significantly impact the universe. Their explosive nature and the elements they produce contribute to the ongoing process of cosmic evolution. As we continue to study these magnificent explosions, we gain deeper insights into the workings of the universe and our place within it. The phenomenon of supernovae not only enriches our understanding of astrophysics but also inspires us to ponder the mysteries of existence itself.

宇宙是一个广阔而神秘的地方，充满了让科学家和天文学家困惑的奇观。其中最壮观的现象之一就是超新星的发生，这是一种标志着大质量恒星临终时的强大爆炸。这些星体事件不仅照亮了夜空，还在星系的演化和元素在宇宙中的分布中发挥着至关重要的作用。超新星发生在一颗恒星耗尽其核燃料并无法再抵抗自身引力坍缩时。这一过程导致亮度的剧增，通常在短时间内比整个星系还要明亮。超新星主要有两种类型：I型和II型。I型超新星发生在双星系统中，其中一颗白矮星从伴星吸取物质，最终触发热核爆炸。而II型超新星则发生在一颗大质量恒星耗尽核燃料后，在自身重力的作用下坍缩，导致能量的爆炸性释放。超新星释放的能量惊人，相当于太阳在其整个生命周期中发出的总能量，所有这些能量在几天或几周内释放。这个巨大的能量将铁、镍等重元素散布到太空中，丰富了星际介质。这些元素对新恒星、行星甚至生命的形成至关重要。因此，超新星不仅仅是宇宙烟花；它们是宇宙化学演化的重要贡献者。观察超新星对于我们理解宇宙膨胀具有重要意义。在20世纪90年代末，发现遥远的Ia型超新星导致了一个突破性的结论，即宇宙不仅在膨胀，而且以加速的速度膨胀。这个发现对宇宙学有深远的影响，并引出了暗能量的概念，这是一种神秘的力量，推动着这种加速。除了科学重要性，超新星在历史上也吸引了艺术家和故事讲述者的想象。它们象征着转变和重生，反映了宇宙中生命与死亡的循环。一颗超新星的明亮闪光可以作为希望和重生的隐喻，提醒我们在毁灭中可能出现的美丽。总之，超新星不仅仅是天文事件；它们是恒星生命周期中的关键时刻，对宇宙产生重大影响。它们的爆炸性质和所产生的元素促进了宇宙的持续演化。随着我们继续研究这些宏伟的爆炸，我们对宇宙的运作及我们在其中的位置有了更深入的理解。超新星现象不仅丰富了我们对天体物理学的理解，还激励我们思考存在本身的奥秘。