sidereal hour angle of observer's meridian

简明释义

测者的恒星时角

英英释义

例句

1.The telescope's alignment was adjusted based on the sidereal hour angle of observer's meridian for optimal observation.

望远镜的对准是根据观察者子午线的恒星时角进行调整，以获得最佳观察效果。

2.During the lecture, the professor explained the significance of the sidereal hour angle of observer's meridian in celestial navigation.

在讲座中，教授解释了观察者子午线的恒星时角在天文导航中的重要性。

3.The astronomer calculated the sidereal hour angle of observer's meridian to determine the position of a star in the night sky.

天文学家计算了观察者子午线的恒星时角以确定夜空中一颗星星的位置。

4.In astrophysics, the sidereal hour angle of observer's meridian helps in predicting celestial events.

在天体物理学中，观察者子午线的恒星时角有助于预测天文事件。

5.To accurately track the planets, one must understand the sidereal hour angle of observer's meridian at different times.

为了准确追踪行星，必须理解不同时间的观察者子午线的恒星时角。

作文

In the field of astronomy, understanding the position of celestial bodies is crucial for navigation and observation. One concept that plays a significant role in this understanding is the sidereal hour angle of observer's meridian. This term refers to the angle between the observer's meridian and the hour circle of a celestial object, measured in time units. To grasp this concept better, we need to break it down into its components and understand its significance in astronomical observations.First, let’s discuss what an observer's meridian is. The observer's meridian is an imaginary line that runs from the North Pole to the South Pole, passing directly overhead through the observer's location. This line helps astronomers determine the local noon when the sun is at its highest point in the sky. Now, when we talk about the sidereal hour angle of observer's meridian, we are essentially measuring how far a celestial object has moved from this meridian in terms of time. The sidereal hour angle is measured in hours, with each hour corresponding to 15 degrees of rotation of the Earth. Therefore, if a star is located directly on the observer's meridian, its sidereal hour angle of observer's meridian is zero. If the star is one hour away from the meridian, the angle is 15 degrees; two hours away corresponds to 30 degrees, and so forth. This measurement is vital for astronomers as it allows them to track the movement of stars and other celestial bodies across the night sky.Understanding the sidereal hour angle of observer's meridian is essential not only for theoretical astronomy but also for practical applications such as telescope alignment and astrological calculations. For instance, when using a telescope, astronomers need to know the precise position of celestial objects to make accurate observations. By calculating the sidereal hour angle of observer's meridian, they can adjust their instruments accordingly to ensure that they are pointing at the right spot in the sky.Moreover, the concept of the sidereal hour angle of observer's meridian is closely related to the concept of local sidereal time. Local sidereal time is essentially the angle of the observer's meridian measured in relation to the vernal equinox. It tells us what celestial objects are currently crossing the observer's meridian. By knowing the local sidereal time and the sidereal hour angle of observer's meridian, astronomers can predict when specific stars will be visible in the night sky.In conclusion, the sidereal hour angle of observer's meridian is a fundamental concept in astronomy that provides valuable information about the position of celestial bodies relative to an observer's location. By understanding this concept, astronomers can enhance their observational skills and improve their ability to navigate the vastness of the universe. The intricate relationship between time, angles, and celestial movements highlights the beauty and complexity of astronomical science, making it an exciting field for both amateurs and professionals alike.

在天文学领域，理解天体的位置对导航和观察至关重要。一个在这一理解中发挥重要作用的概念是观测者子午线的恒星时角。这个术语指的是观测者的子午线与某个天体的时圈之间的角度，以时间单位来测量。为了更好地掌握这个概念，我们需要将其分解为几个组成部分，并理解它在天文观察中的重要性。首先，让我们讨论一下观测者的子午线是什么。观测者的子午线是一条想象中的线，从北极延伸到南极，正好经过观测者的位置。这条线帮助天文学家确定当地的正午，即太阳在天空中最高点的时候。现在，当我们谈论观测者子午线的恒星时角时，我们实际上是在测量某个天体相对于这个子午线的移动距离，以时间为单位。恒星时角以小时为单位进行测量，每小时对应于地球旋转15度。因此，如果一颗星星位于观测者的子午线上，它的观测者子午线的恒星时角为零。如果这颗星星距离子午线一小时，那么角度就是15度；如果距离两小时，则角度为30度，依此类推。这个测量对于天文学家来说至关重要，因为它允许他们追踪星星和其他天体在夜空中的运动。理解观测者子午线的恒星时角不仅对理论天文学至关重要，而且对实际应用（如望远镜对准和占星术计算）也非常重要。例如，在使用望远镜时，天文学家需要知道天体的确切位置，以便进行准确的观察。通过计算观测者子午线的恒星时角，他们可以相应地调整仪器，确保望远镜指向天空中的正确位置。此外，观测者子午线的恒星时角的概念与地方恒星时间的概念密切相关。地方恒星时间本质上是观测者子午线相对于春分点的角度。它告诉我们当前哪些天体正在穿越观测者的子午线。通过了解地方恒星时间和观测者子午线的恒星时角，天文学家可以预测特定星星何时会在夜空中可见。总之，观测者子午线的恒星时角是天文学中的一个基本概念，它提供了有关天体相对于观测者位置的重要信息。通过理解这一概念，天文学家可以增强他们的观察技能，提高他们在浩瀚宇宙中导航的能力。时间、角度和天体运动之间的复杂关系突显了天文学科学的美丽和复杂性，使其成为业余爱好者和专业人士都感兴趣的激动人心的领域。