variable star

简明释义

变星

英英释义

例句

1.The famous star Betelgeuse is classified as a variable star (变星) due to its fluctuating luminosity.

著名的星星贝特尔吉斯被归类为变星（变星），因为它的光度波动。

2.Many amateur astronomers enjoy observing variable stars (变星) and contributing to scientific research.

许多业余天文学家喜欢观察变星（变星）并为科学研究做出贡献。

3.Understanding the mechanisms behind a variable star (变星) can lead to new discoveries in astrophysics.

理解变星（变星）背后的机制可以带来天体物理学的新发现。

4.Astronomers often study the brightness changes of a variable star (变星) to understand stellar evolution.

天文学家经常研究变星（变星）的亮度变化，以理解恒星演化。

5.The light curve of a variable star (变星) reveals important information about its physical properties.

一颗变星（变星）的光曲线揭示了其物理特性的重要信息。

作文

The universe is filled with countless wonders, and one of the most intriguing phenomena in the night sky is the presence of a variable star. A variable star is a type of star whose brightness changes over time. This variability can occur for various reasons, including intrinsic factors such as pulsations or eruptions, or extrinsic factors like the presence of a companion star that eclipses it. Understanding variable stars not only enriches our knowledge of stellar evolution but also enhances our appreciation for the complexities of the cosmos.In the realm of astronomy, variable stars are categorized into different types based on their behavior. For instance, there are pulsating variable stars like Cepheids, which expand and contract rhythmically, causing their brightness to vary in a predictable manner. These stars are crucial for measuring cosmic distances, as their period-luminosity relationship allows astronomers to determine how far away they are from Earth. Another fascinating category includes eruptive variable stars, such as novae and supernovae, which undergo dramatic increases in brightness due to explosive events.The study of variable stars has significant implications for our understanding of the universe. By observing these stars, scientists can gather valuable data about stellar lifecycles, chemical compositions, and the dynamics of galaxies. For example, when a variable star experiences a supernova explosion, it releases an immense amount of energy and material into space, influencing the formation of new stars and planetary systems. This process highlights the interconnectedness of celestial phenomena and the continuous cycle of creation and destruction in the universe.Moreover, variable stars serve as essential tools for astronomers. The periodic changes in their brightness allow researchers to calibrate their instruments and refine their measurements of other astronomical objects. By studying these stars, scientists can also explore the fundamental questions of astrophysics, such as the nature of dark matter and dark energy, which constitute much of the universe yet remain largely mysterious.In addition to their scientific significance, variable stars have captured the imagination of stargazers throughout history. Many cultures have myths and legends associated with these celestial bodies, viewing them as symbols of change and transformation. The twinkling light of a variable star can evoke a sense of wonder and curiosity, prompting people to look up at the night sky and ponder their place in the universe.In conclusion, the phenomenon of variable stars is a testament to the dynamic nature of the cosmos. Their changing brightness provides a window into the life cycles of stars and the intricate processes that govern the universe. As we continue to study these fascinating objects, we deepen our understanding of the cosmos and our connection to it. Whether through scientific inquiry or poetic reflection, variable stars remind us of the beauty and complexity of the universe, inviting us to explore further and dream bigger.

宇宙中充满了无数的奇观，其中夜空中最引人入胜的现象之一就是存在着的变星。变星是一种亮度随时间变化的恒星。这种变化可能由于多种原因发生，包括内在因素如脉动或喷发，或外在因素如伴星的存在使其发生掩蔽。理解变星不仅丰富了我们对恒星演化的知识，也增强了我们对宇宙复杂性的欣赏。在天文学领域，变星根据其行为被分类为不同类型。例如，有脉动的变星如造父变星，它们以规律的方式扩张和收缩，导致其亮度以可预测的方式变化。这些恒星对于测量宇宙距离至关重要，因为它们的周期-亮度关系使天文学家能够确定它们离地球的远近。另一个迷人的类别包括喷发型变星，如新星和超新星，它们因爆炸事件而经历亮度的剧烈增加。对变星的研究对我们理解宇宙有重要意义。通过观察这些恒星，科学家可以收集关于恒星生命周期、化学成分和星系动力学的宝贵数据。例如，当一颗变星经历超新星爆炸时，它会向太空释放大量能量和物质，影响新恒星和行星系统的形成。这个过程突显了天体现象之间的相互联系以及宇宙中创造与毁灭的持续循环。此外，变星作为天文学家的重要工具。它们亮度的周期性变化使研究人员能够校准仪器并改善对其他天文物体的测量。通过研究这些恒星，科学家还可以探索天体物理学的基本问题，例如暗物质和暗能量的性质，这些物质构成了宇宙的大部分，但仍然大体上是神秘的。除了科学意义，变星在历史上也吸引了观星者的想象力。许多文化都有与这些天体相关的神话和传说，将它们视为变化和转变的象征。一颗变星闪烁的光芒可以唤起敬畏和好奇，促使人们仰望夜空，思考自己在宇宙中的位置。总之，变星现象证明了宇宙的动态本质。它们亮度的变化为我们提供了观察恒星生命周期和支配宇宙的复杂过程的窗口。随着我们继续研究这些迷人的天体，我们加深了对宇宙及其与我们的联系的理解。无论是通过科学探究还是诗意反思，变星都提醒我们宇宙的美丽与复杂，邀请我们进一步探索和更大地梦想。