nebula

简明释义

英[ˈnebjələ]美[ˈnebjələ]

n. 星云；角膜云翳

复 数 n e b u l a e 或 n e b u l a s

英英释义

单词用法

同义词

反义词

例句

1.To the right is a star-forming nebula of dust and gas, called S175.

在图片的右边是正在孕育着恒星的星云尘埃和气体，我们叫它S175。

2.Similar epic battles are being waged all over the star-forming Carina Nebula.

类似的史诗般恢宏战役正在船底星云的各恒星形成区进行着。

3.It seems very unlikely that large portions of the nebula were heated to such extreme temperatures, and huge nebula areas could not possibly have lost heat so fast.

星云的大部分都被加热到如此极端的温度似乎是不太可能的，而巨大的星云区域不可能这么快就失去热量。

4.As the nebula collapsed caused by its gravity, it spun faster and flattened into a disk.

当星云因其重力而坍缩时，它旋转得更快，并压扁成一个盘状。

5.See photos of new planetary nebula.

查看新的关于行星云团的照片。

6.Radiation from hot, young stars has slowly eroded the nebula over millions of years.

数百万年来炎热的年轻恒星发出的辐射不断的侵蚀着这个星云。

7.The same minerals that occur in refractory inclusions are believed to be the earliest-formed substances to have condensed out of the solar nebula.

难熔的内含物中的那种矿物质，也被认为是最早形成的太阳星云凝结的物质。

8.Like its mythological namesake, the nebula is associated with a dramatic transformation.

如它的希腊神话同名者，星云与一戏剧性的变化相关。

9.During his sophomore year, he sold his first science-fiction story to a Scottish magazine named Nebula.

在他大二的时候，他把自己的第一个科幻故事卖给了一家名为《星云》的苏格兰杂志。

10.The Orion nebula is one of the brightest nebulae visible to the naked eye.

猎户座星云是肉眼可见的最亮的星云之一。

11.The colors of a nebula can vary greatly depending on its composition.

一个星云的颜色可以根据其成分而有很大变化。

12.The Crab nebula is a supernova remnant located in the constellation Taurus.

蟹星云是位于金牛座的超新星遗迹。

13.Astronomers study the formation of stars within a nebula.

天文学家研究在星云中形成的恒星。

14.Many nebulae are found in the Milky Way galaxy.

许多星云位于银河系中。

作文

In the vast expanse of the universe, there are countless wonders that capture the imagination of both scientists and dreamers alike. Among these celestial phenomena, one of the most fascinating is the nebula, which is often described as a stellar nursery where new stars are born. A nebula (星云) is essentially a giant cloud of gas and dust in space, and it plays a crucial role in the life cycle of stars. The beauty of a nebula is not just in its appearance but also in its significance to our understanding of the cosmos.The word nebula comes from the Latin term for 'cloud,' and this is fitting given the ethereal and diffuse nature of these astronomical structures. There are several types of nebulae, each with unique characteristics and functions. For instance, emission nebulae are clouds of gas that emit light due to the ionization of their atoms by nearby hot stars. This ionization gives rise to stunning colors that we often see in images captured by telescopes. On the other hand, reflection nebulae do not emit their own light but instead reflect the light from nearby stars, creating a beautiful glow that can be seen across vast distances.The life cycle of a star begins in a nebula (星云). Under the influence of gravity, regions within the nebula begin to collapse, forming clumps of material that eventually become protostars. As these protostars gather more mass and heat up, they enter the next stage of their development, eventually igniting nuclear fusion in their cores and becoming full-fledged stars. This process is not only essential for the formation of stars but also for the creation of heavier elements, which are produced during stellar fusion and released into space when stars explode in supernovae.The study of nebulae provides astronomers with valuable information about the composition of the universe and the processes that govern star formation. By observing different nebulae, scientists can learn about the chemical elements present in these clouds and how they contribute to the formation of new stars and planetary systems. This research is vital for understanding the origins of our own solar system and the potential for life elsewhere in the universe.Moreover, nebulae are not just important for star formation; they also serve as a canvas for some of the most breathtaking images captured by telescopes like the Hubble Space Telescope. These images showcase the vibrant colors and intricate structures of nebulae, inspiring awe and wonder in people around the world. The Pillars of Creation, a famous image of a region in the Eagle nebula, has become iconic, illustrating the beauty and complexity of the universe.In conclusion, the concept of a nebula (星云) transcends mere scientific terminology; it represents the ongoing dance of creation and destruction in the universe. Understanding nebulae enriches our knowledge of astrophysics and deepens our appreciation for the cosmos. As we continue to explore the universe, the mysteries of nebulae will undoubtedly reveal more about our place in the grand tapestry of existence. Each nebula holds secrets waiting to be uncovered, reminding us that there is still so much left to learn about the universe we inhabit.

在宇宙的广阔空间中，有无数奇观吸引着科学家和梦想者的想象。其中最迷人的现象之一就是星云，它常被描述为新星诞生的恒星摇篮。星云（nebula）本质上是太空中一个巨大的气体和尘埃云，它在恒星的生命周期中扮演着至关重要的角色。星云的美不仅在于它的外观，还在于它对我们理解宇宙的重要性。星云这个词源自拉丁语，意为“云”，这一点非常贴切，因为这些天文结构具有虚幻和弥散的特性。星云有几种类型，每种都有独特的特征和功能。例如，发射星云是由于附近热恒星的离子化而发出光的气体云。这种离子化产生了我们在望远镜拍摄的图像中常见的惊人颜色。另一方面，反射星云并不发出自己的光，而是反射附近恒星的光，创造出可以在浩瀚距离中看到的美丽光辉。恒星的生命周期始于星云（nebula）。在引力的影响下，星云内部的区域开始坍缩，形成最终成为原恒星的物质团块。当这些原恒星聚集更多质量并升温时，它们进入发展的下一个阶段，最终在其核心点燃核聚变，成为完全成熟的恒星。这个过程不仅对恒星的形成至关重要，而且对于重元素的创造也至关重要，这些元素在恒星的融合过程中产生，并在恒星以超新星爆炸的形式释放到太空中。对星云的研究为天文学家提供了有关宇宙组成和主导恒星形成过程的宝贵信息。通过观察不同的星云，科学家可以了解这些云中存在的化学元素以及它们如何促进新恒星和行星系统的形成。这项研究对于理解我们自己太阳系的起源以及宇宙中其他地方生命的潜力至关重要。此外，星云不仅对恒星形成重要，它们还为哈勃太空望远镜等望远镜拍摄的一些最令人叹为观止的图像提供了画布。这些图像展示了星云的鲜艳色彩和复杂结构，激发了全世界人们的敬畏与惊奇。创造之柱，鹰星云中的一个著名图像，已成为标志性，展示了宇宙的美丽和复杂性。总之，星云（nebula）的概念超越了单纯的科学术语；它代表了宇宙中创造与毁灭的持续舞蹈。理解星云丰富了我们对天体物理学的知识，加深了我们对宇宙的欣赏。随着我们继续探索宇宙，星云的神秘无疑会揭示出更多关于我们在宏伟存在中的位置的信息。每个星云都蕴藏着等待揭开的秘密，提醒我们在我们居住的宇宙中还有很多东西值得学习。