sidereal hour angle of a star

简明释义

某恒星的恒星时角

英英释义

例句

1.To calculate the position of a star in the sky, astronomers often refer to the sidereal hour angle of a star (恒星时角).

为了计算星星在天空中的位置，天文学家通常参考恒星时角 (sidereal hour angle of a star)。

2.By knowing the sidereal hour angle of a star (恒星时角), navigators can adjust their course at sea more accurately.

通过了解恒星时角 (sidereal hour angle of a star)，航海者可以更准确地调整他们在海上的航向。

3.The telescope's software calculates the sidereal hour angle of a star (恒星时角) to help locate celestial objects.

望远镜的软件计算恒星时角 (sidereal hour angle of a star)以帮助定位天体。

4.During the observation session, we recorded the sidereal hour angle of a star (恒星时角) every hour.

在观测期间，我们每小时记录一次恒星时角 (sidereal hour angle of a star)。

5.The sidereal hour angle of a star (恒星时角) helps in determining when a star will be visible in the night sky.

星星的恒星时角 (sidereal hour angle of a star) 有助于确定星星何时会在夜空中可见。

作文

The universe is a vast expanse filled with countless celestial bodies, each exhibiting unique characteristics and behaviors. Among these celestial wonders, stars hold a special place in both scientific study and human fascination. One key concept in the study of stars is the sidereal hour angle of a star, which plays a crucial role in understanding their positions in the sky. To grasp this concept, it is essential to explore its definition, significance, and practical applications in astronomy.The sidereal hour angle of a star refers to the angle that measures the time since a star crossed the local meridian, expressed in angular measurement. More specifically, it is measured in hours, minutes, and seconds, where one hour corresponds to 15 degrees of rotation of the Earth. This measurement is vital for astronomers as it allows them to determine the position of a star at any given moment, relative to an observer on Earth.Understanding the sidereal hour angle of a star is particularly important for navigation and celestial mapping. When sailors navigated the oceans centuries ago, they relied heavily on the stars for guidance. By calculating the sidereal hour angle of a star, navigators could accurately determine their latitude and longitude, ensuring they stayed on course during their voyages. Even today, modern astronomers utilize this concept to pinpoint the locations of stars and other celestial objects in the night sky.Moreover, the sidereal hour angle of a star serves as a fundamental component in the field of astrophysics. It aids in the study of stellar motion and the dynamics of celestial systems. For instance, by observing how the sidereal hour angle of a star changes over time, scientists can infer information about the star's distance from Earth, its speed, and even its trajectory through space. This information is crucial for understanding the life cycles of stars and their interactions with other celestial bodies.In addition to its scientific implications, the sidereal hour angle of a star also holds cultural significance. Throughout history, various civilizations have looked to the stars for inspiration and guidance. The ancient Greeks, for example, created elaborate myths and stories based on the constellations, many of which are still recognized today. The ability to measure the sidereal hour angle of a star has allowed humanity to connect with the cosmos in a meaningful way, fostering a sense of wonder and curiosity about our place in the universe.In conclusion, the sidereal hour angle of a star is a vital concept in astronomy that encompasses both practical and theoretical aspects of celestial observation. By measuring the time since a star crossed the local meridian, astronomers can accurately determine its position in the sky, facilitating navigation, research, and cultural expression. As we continue to explore the mysteries of the universe, the understanding of concepts like the sidereal hour angle of a star will undoubtedly deepen our appreciation for the stars that illuminate our night skies.

宇宙是一个广阔的空间，充满了无数的天体，每个天体都展现出独特的特征和行为。在这些天体中，星星在科学研究和人类的迷恋中占据了特殊的位置。研究星星的一个关键概念是恒星的恒星时角，它在理解星星在天空中的位置方面发挥着至关重要的作用。要掌握这个概念，首先需要探讨它的定义、重要性和在天文学中的实际应用。恒星的恒星时角是指测量一颗星星越过当地子午线以来的时间所对应的角度，以角度测量表示。更具体地说，它以小时、分钟和秒为单位进行测量，其中一个小时对应于地球自转的15度。这一测量对天文学家至关重要，因为它使他们能够确定某一时刻星星相对于地球观察者的位置。理解恒星的恒星时角对于导航和天体测绘尤其重要。当几个世纪前的水手在海洋中航行时，他们极大依赖星星作为指引。通过计算恒星的恒星时角，导航员能够准确确定他们的纬度和经度，确保他们在航行过程中保持正确的航向。即使在今天，现代天文学家也利用这一概念来精确定位夜空中的星星和其他天体。此外，恒星的恒星时角在天体物理学领域也是一个基础组成部分。它有助于研究恒星运动和天体系统的动态。例如，通过观察恒星的恒星时角随时间的变化，科学家可以推断出有关星星距离地球的远近、速度，甚至其在太空中的轨迹等信息。这些信息对于理解恒星的生命周期及其与其他天体的相互作用至关重要。除了科学意义外，恒星的恒星时角在文化上也具有重要意义。历史上，各个文明都仰望星空寻找灵感和指引。古希腊人就创造了基于星座的复杂神话和故事，其中许多至今仍被人们所认知。能够测量恒星的恒星时角使人类能够以有意义的方式与宇宙连接，培养了我们对宇宙中自身位置的敬畏与好奇。总之，恒星的恒星时角是天文学中的一个重要概念，涵盖了天体观察的实际和理论方面。通过测量星星越过当地子午线以来的时间，天文学家能够准确确定其在天空中的位置，从而促进导航、研究和文化表达。随着我们继续探索宇宙的奥秘，对像恒星的恒星时角这样的概念的理解无疑将加深我们对照亮夜空的星星的欣赏。