nebulas

简明释义

英[ˈnɛb.jə.ləs]美[ˈnɛb.jə.ləs]

星云

角膜云翳（nebula 的复数）

英英释义

单词用法

同义词

反义词

例句

1.According to NASA, "Hubbles keen eye disclosed that planetary nebulas are like snowflakes: no two are like."

哈勃望远镜告诉人们，行星状星云就像雪花一样，没有任何两个是一样的。

2.Good spectra of the spiral nebulas are difficult to obtain because of their extreme faintness.

旋涡星云因为非常暗，难以得到它们的清晰的光谱。

3.Find planets, stars, nebulas, galaxies and more that you select.

寻找您选择的行星，恒星，星云，星系及其它目标。

4.Someone wrote letter to tell bishop that Nebulas Flacon was a koradji and rascal. They wanted to evict him out of the Vyborg City.

弗兰肯，有些人给主教写信说弗兰肯是个巫师，是个坏蛋，他们想把他赶出维堡市。

5.This assumption think that all of the Earth and the moons are the nebulas which floats in the solar systems through revolving and absorbing to accumulate and become a star body in the meantime.

这一假设认为，地球和月球都是太阳系中浮动的星云，经过旋转和吸积，同时形成星体。

6.Nebulas include Messier objects M8, M16, M20, as well as the Pipe and Cat's Paw nebulas.

星云有梅西耶天体M8、M16、M20，还包括烟斗星云和毛掌星云。

7.Astronomers use telescopes to study distant nebulas (星云) in the universe.

天文学家使用望远镜研究宇宙中遥远的nebulas（星云）。

8.The Orion nebula (猎户座星云) is one of the brightest and most studied nebulas (星云) in the night sky.

猎户座nebula（星云）是夜空中最亮和研究最多的nebulas（星云）之一。

9.Many nebulas (星云) are formed from the remnants of dead stars.

许多nebulas（星云）是由死去的恒星遗骸形成的。

10.The beauty of colorful nebulas (星云) can often be seen in astrophotography.

在天文摄影中，五彩斑斓的nebulas（星云）的美丽常常可见。

11.Some nebulas (星云) serve as stellar nurseries where new stars are born.

一些nebulas（星云）作为恒星摇篮，新的恒星在这里诞生。

作文

In the vast expanse of the universe, there exists a myriad of celestial phenomena that captivate the imagination of astronomers and stargazers alike. One of the most fascinating of these phenomena is the formation of nebulas, or 星云 in Chinese. These clouds of gas and dust serve as the birthplaces of stars, making them crucial to our understanding of cosmic evolution. Nebulas can be broadly categorized into several types, including emission, reflection, and dark nebulas, each with its unique characteristics and significance. Emission nebulas, for instance, are regions where gas is ionized by the intense radiation from nearby hot stars. This ionization causes the gas to glow brightly, creating stunning visual displays that can be seen through telescopes. The Orion Nebula, one of the most famous nebulas, is an excellent example of an emission nebula. It is located in the Milky Way and is easily visible to the naked eye, showcasing a vibrant array of colors that illustrate the complex processes occurring within it. On the other hand, reflection nebulas do not emit their light but instead reflect the light of nearby stars. They often appear blue because blue light is scattered more than other colors. The Horsehead Nebula, another iconic nebula, is a dark nebula that is part of the larger Orion Molecular Cloud Complex. Its distinct shape resembles a horse's head and is a favorite subject among astrophotographers. Dark nebulas are dense clouds of gas and dust that block the light from stars and other objects behind them. They are often observed as dark patches against the backdrop of brighter stars and nebulas. These regions are essential for star formation, as they provide the necessary material and conditions for new stars to ignite. The study of nebulas not only enhances our understanding of star formation but also sheds light on the life cycle of stars. When a massive star exhausts its nuclear fuel, it undergoes a supernova explosion, dispersing its outer layers into space. This material can then contribute to the formation of new nebulas, continuing the cycle of cosmic rebirth. Moreover, nebulas play a significant role in the chemical enrichment of the universe. As stars form, live, and die, they produce heavier elements through nuclear fusion. When these stars explode, they scatter these elements into the surrounding space, enriching the interstellar medium. Future generations of stars and planets will incorporate these elements, leading to the diverse chemistry we observe in the universe today. In conclusion, nebulas are not merely beautiful structures in the night sky; they are fundamental to the fabric of our universe. They represent both the birthplace of stars and the remnants of their explosive deaths. Understanding nebulas allows us to appreciate the dynamic processes that shape our cosmos, reminding us of the intricate connections between creation and destruction in the universe. As we continue to explore the depths of space, nebulas will undoubtedly remain a key focus of astronomical research, offering insights into the mysteries of existence beyond our planet.

在宇宙的广阔空间中，存在着无数迷人的天体现象，吸引着天文学家和观星者的想象。其中最引人入胜的现象之一就是星云的形成。星云是气体和尘埃的云团，作为恒星的诞生地，对我们理解宇宙演化至关重要。星云可以大致分为几种类型，包括发射星云、反射星云和暗星云，每种都有其独特的特征和意义。 例如，发射星云是气体被附近热恒星的强辐射电离的区域。这种电离使气体发出明亮的光芒，创造出通过望远镜可见的惊人视觉效果。猎户座星云就是一个著名的发射星云实例，位于银河系中，肉眼可见，展示出丰富多彩的色彩，展示了其内部复杂的过程。 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。它们通常呈蓝色，因为蓝光比其他颜色更容易散射。马头星云是另一个标志性的星云，是猎户座分子云复合体的一部分。其独特的形状类似于马头，是天文摄影师的最爱。 暗星云是密集的气体和尘埃云，阻挡来自后方恒星和其他物体的光。它们常常被观察为在更亮的恒星和星云背景下的黑暗斑块。这些区域对恒星形成至关重要，因为它们提供了新恒星点燃所需的材料和条件。 对星云的研究不仅增强了我们对恒星形成的理解，还揭示了恒星的生命周期。当一颗大质量恒星耗尽其核燃料时，会经历超新星爆炸，向太空散播其外层物质。这些物质随后可以促进新的星云的形成，继续宇宙重生的循环。 此外，星云在宇宙的化学丰富性中也起着重要作用。当恒星形成、生活和死亡时，它们通过核聚变产生更重的元素。当这些恒星爆炸时，它们将这些元素散布到周围的空间，丰富了星际介质。未来几代恒星和行星将吸收这些元素，从而导致我们今天在宇宙中观察到的多样化化学成分。 总之，星云不仅仅是夜空中美丽的结构；它们是我们宇宙的基础。它们代表了恒星的诞生地和它们爆炸死亡后的遗骸。理解星云使我们能够欣赏塑造我们宇宙的动态过程，提醒我们宇宙中创造与毁灭之间的复杂联系。随着我们继续探索太空的深处，星云无疑将继续成为天文学研究的关键焦点，提供对我们星球之外存在之谜的深入见解。