easterly hour angle

简明释义

东时角(曾用名

英英释义

例句

1.During the solar observation, the researcher noted the easterly hour angle as part of the data collection.

在太阳观察期间，研究人员将东向时角作为数据收集的一部分记录下来。

2.The easterly hour angle is essential for calculating the local sidereal time.

东向时角对于计算当地恒星时间至关重要。

3.To accurately track the sun's movement, we need to know the easterly hour angle at noon.

为了准确追踪太阳的运动，我们需要知道中午时的东向时角。

4.In celestial navigation, the easterly hour angle helps sailors find their way by referencing celestial bodies.

在天文导航中，东向时角帮助水手通过参考天体找到方向。

5.The astronomer calculated the easterly hour angle to determine the position of the star in the night sky.

天文学家计算了东向时角以确定星星在夜空中的位置。

作文

Understanding the concept of the easterly hour angle is crucial for anyone interested in astronomy and celestial navigation. The term refers to the angular measurement of time, expressed in degrees, that indicates how far a celestial body has moved from the observer's local meridian towards the east. This concept is particularly important when calculating the positions of stars and planets in the night sky. In essence, the easterly hour angle helps astronomers and navigators determine the precise position of celestial objects relative to their own geographical location.To grasp the significance of the easterly hour angle, one must first understand the basic principles of celestial navigation. Navigators use the stars and other celestial bodies to find their way across oceans and vast landscapes. By measuring the angles between these celestial bodies and the horizon, they can establish their position on Earth. The easterly hour angle plays a vital role in this process, as it allows navigators to track the movement of celestial bodies as the Earth rotates.The Earth rotates 360 degrees in approximately 24 hours, which means it rotates about 15 degrees every hour. Therefore, when we talk about the easterly hour angle, we are referring to the number of degrees a celestial object has moved eastward from the local meridian. For example, if a star is directly overhead at midnight, its easterly hour angle would be 0 degrees. However, as time passes and the Earth continues to rotate, the star will appear to move eastward in the sky, and its easterly hour angle will increase.In practical terms, knowing the easterly hour angle can help astronomers predict when certain stars or planets will be visible in the night sky. This is particularly useful for amateur astronomers who wish to observe specific celestial events. By calculating the easterly hour angle, they can determine the best times to set up their telescopes and enjoy the wonders of the universe.Moreover, the easterly hour angle can also be used in conjunction with other astronomical tools, such as star charts and software applications. These tools often include calculations for the easterly hour angle, making it easier for users to locate celestial objects. Understanding this concept can enhance one's ability to navigate the night sky and appreciate the beauty of the cosmos.In conclusion, the easterly hour angle is a fundamental concept in astronomy that aids in the understanding of celestial navigation and observation. It represents the angular distance that a celestial body has moved eastward from the local meridian, allowing astronomers and navigators to pinpoint the positions of stars and planets. Whether you are an experienced astronomer or a curious beginner, mastering the concept of the easterly hour angle can greatly enhance your experience of exploring the night sky. With practice, anyone can learn to use this knowledge to deepen their appreciation for the universe around them.

理解东向时角这一概念对于任何对天文学和天体导航感兴趣的人来说都是至关重要的。该术语指的是时间的角度测量，以度数表示，表明一个天体从观察者的本地子午线向东移动了多远。这个概念在计算星星和行星在夜空中的位置时尤为重要。实际上，东向时角帮助天文学家和导航员确定天体相对于他们自身地理位置的精确位置。要理解东向时角的意义，首先必须了解天体导航的基本原理。导航员利用星星和其他天体在广阔的海洋和陆地上找到自己的方向。通过测量这些天体与地平线之间的角度，他们可以确定自己在地球上的位置。东向时角在这一过程中发挥着至关重要的作用，因为它允许导航员跟踪天体随着地球自转而移动。地球大约在24小时内旋转360度，这意味着它每小时旋转约15度。因此，当我们谈论东向时角时，我们指的是一个天体从本地子午线向东移动的度数。例如，如果一颗星星在午夜时正好在头顶上，它的东向时角将是0度。然而，随着时间的推移，地球继续旋转，这颗星星在天空中似乎会向东移动，它的东向时角将增加。在实际应用中，了解东向时角可以帮助天文学家预测某些星星或行星何时可见于夜空。这对于希望观察特定天文事件的业余天文学家尤其有用。通过计算东向时角，他们可以确定最佳的观测时间，从而搭建望远镜，享受宇宙的奇观。此外，东向时角还可以与其他天文学工具结合使用，例如星图和软件应用程序。这些工具通常包括东向时角的计算，使用户更容易定位天体。理解这一概念可以增强人们在夜空中导航的能力，并欣赏宇宙的美丽。总之，东向时角是天文学中的一个基本概念，有助于理解天体导航和观测。它表示一个天体从本地子午线向东移动的角度距离，使天文学家和导航员能够确定星星和行星的位置。无论你是经验丰富的天文学家还是好奇的初学者，掌握东向时角的概念都可以极大地增强你探索夜空的体验。通过实践，任何人都可以学习使用这一知识来加深对周围宇宙的欣赏。