protostar

简明释义

英[/ˈproʊtəˌstɑr/]美[/ˈproʊtəˌstɑr/]

n. [天] 原恒星

英英释义

单词用法

同义词

反义词

例句

1.January 27, 2010 - Gas and dust whorl around a stellar embryo as jets of material pour from the poles in an artist's rendering of the massive protostar W33A.

2010年1月27日-气体和尘埃螺纹围绕一个恒星的物质飞机从胚胎倒在一个艺术家的庞大的原恒星w 33 A呈现两极。

2.The simulation reveals how pre-stellar gases would have actually evolved under the simpler physics of the early universe to form this protostar.

这一模仿展示了前星体云怎样在早期宇宙这么简单的物理条件下形成的。

3.The conditions in a protostar resemble far more closely in situation in red giants, most of whose volume is caught up in stormy convection.

原恒星的条件更加类似于红巨星的情形，红巨星体积的大部分都卷入剧烈的对流中。

4.It was compressed enough to become a protostar but enough material was left over to form planets, moons, asteroids and comets.

压力足够使之形成一颗恒星，剩下的物质形成了行星，卫星，小行星和彗星。

5.January 27, 2010 - Gas and dust whorl around a stellar embryo as jets of material pour from the poles in an artist's rendering of the massive protostar W33A.

2010年1月27日-气体和尘埃螺纹围绕一个恒星的物质飞机从胚胎倒在一个艺术家的庞大的原恒星w 33 A呈现两极。

6.Astronomers use telescopes to observe the formation of a protostar, which can take millions of years, or 原恒星。

天文学家使用望远镜观察原恒星的形成，这个过程可能需要数百万年。

7.Once a protostar accumulates enough mass, it will eventually become a main sequence star, or 原恒星。

一旦原恒星积累了足够的质量，它最终将成为主序星。

8.The surrounding disk of gas and dust around a protostar is where planets may form, or 原恒星。

环绕在原恒星周围的气体和尘埃盘是行星可能形成的地方。

9.The collapse of a dense region in a molecular cloud leads to the birth of a protostar, or 原恒星.

分子云中一个致密区域的坍塌导致了原恒星的诞生。

10.A young star begins its life cycle as a protostar, or 原恒星, before it ignites nuclear fusion.

一颗年轻的星星在点燃核聚变之前，开始它的生命周期作为一个原恒星。

作文

In the vast expanse of the universe, stars are born from clouds of gas and dust. One of the earliest stages in the formation of a star is known as a protostar. A protostar is essentially a dense region within a molecular cloud that begins to accumulate mass. As gravity pulls material together, the temperature rises, and the protostar starts to form. This process is not instantaneous; it can take millions of years for a protostar to evolve into a fully-fledged star.The journey of a protostar is fascinating. Initially, the material that will become the protostar is spread out and relatively cool. However, as particles collide and stick together, they begin to clump together due to gravitational attraction. This clumping leads to an increase in density, which in turn raises the temperature. Eventually, the core of the protostar becomes hot enough for nuclear fusion to begin, marking the transition from a protostar to a main-sequence star.During this time, a protostar is often surrounded by a rotating disk of gas and dust. This disk can give rise to planets, moons, and other celestial bodies. The interactions between the protostar and its surrounding material can lead to outflows of energy and matter, known as stellar winds. These winds play a crucial role in shaping the environment around the protostar, influencing the formation of planetary systems.One of the most interesting aspects of protostars is their variability. Some protostars may experience fluctuations in brightness and temperature as they continue to gather material and undergo changes in their internal structure. Observing these changes provides valuable insights into the processes that govern star formation.Astronomers use various methods to study protostars. One common technique involves observing infrared radiation, which is emitted by the warm dust surrounding a protostar. This allows scientists to peer through the obscuring clouds of gas and dust that typically surround protostars, revealing their presence and characteristics.Understanding protostars is essential for comprehending the lifecycle of stars. Each protostar has the potential to develop into different types of stars depending on its mass. More massive protostars tend to evolve quickly, becoming massive stars that may end their lives in spectacular supernova explosions. In contrast, less massive protostars may take longer to evolve and can eventually become red dwarfs or even brown dwarfs if they do not accumulate enough mass.In conclusion, the study of protostars is a vital part of astrophysics, shedding light on how stars form and evolve over time. By investigating these early stages of stellar development, scientists can gain a better understanding of the universe's evolution and the origins of the elements that make up everything around us. The journey of a protostar is just the beginning of a star's life, but it is a crucial phase that sets the stage for the diverse array of stars we observe today.

在宇宙的广阔空间中，星星是由气体和尘埃云形成的。恒星形成的最早阶段之一被称为原恒星。原恒星本质上是分子云中的一个致密区域，开始积聚质量。当引力将物质拉拢在一起时，温度升高，原恒星开始形成。这个过程并不是瞬间完成的；一个原恒星可能需要数百万年才能演变成完全成熟的恒星。原恒星的旅程是迷人的。最初，将要成为原恒星的物质分散且相对凉爽。然而，随着粒子碰撞并黏附在一起，它们由于引力吸引而开始聚集。这种聚集导致密度增加，从而提高温度。最终，原恒星的核心变得足够热，以至于可以开始核聚变，这标志着从原恒星到主序星的转变。在此期间，原恒星通常被旋转的气体和尘埃盘包围。这个盘可以产生行星、卫星和其他天体。原恒星与其周围物质之间的相互作用可以导致能量和物质的外流，称为恒星风。这些风在塑造原恒星周围的环境中起着至关重要的作用，影响行星系统的形成。原恒星最有趣的方面之一是它们的可变性。一些原恒星可能会经历亮度和温度的波动，因为它们继续聚集物质并经历内部结构的变化。观察这些变化为我们提供了关于控制恒星形成过程的重要见解。天文学家使用各种方法来研究原恒星。一种常见的技术涉及观察红外辐射，这是由环绕原恒星的温暖尘埃发出的。这使科学家能够透过通常包围原恒星的气体和尘埃云，揭示其存在和特征。理解原恒星对于理解恒星的生命周期至关重要。每个原恒星都有潜力发展成不同类型的恒星，具体取决于其质量。更大质量的原恒星往往演变迅速，成为可能以壮观的超新星爆炸结束生命的大质量恒星。相比之下，较小质量的原恒星可能需要更长时间才能演变，最终可能成为红矮星，或者如果它们没有积累足够的质量，甚至可能成为棕矮星。总之，研究原恒星是天体物理学的重要组成部分，揭示了恒星如何随时间形成和演变。通过研究这些恒星发展的早期阶段，科学家可以更好地理解宇宙的演化以及构成我们周围一切事物的元素的起源。原恒星的旅程仅仅是恒星生命的开始，但这是一个关键阶段，为我们今天观察到的多样化恒星阵列奠定了基础。