sidereal hour angle of the true sun

简明释义

真太阳恒星时角

英英释义

例句

1.During the lecture, the professor explained how to measure the sidereal hour angle of the true sun using a sextant.

在讲座中，教授解释了如何使用六分仪测量太阳的恒星时角。

2.The astronomer calculated the sidereal hour angle of the true sun to determine its position in the sky.

天文学家计算了太阳的恒星时角以确定其在天空中的位置。

3.The sidereal hour angle of the true sun helps astronomers predict solar eclipses.

太阳的恒星时角帮助天文学家预测日食。

4.Understanding the sidereal hour angle of the true sun is crucial for accurate celestial navigation.

理解太阳的恒星时角对于精确的天文导航至关重要。

5.For precise timekeeping, the watchmaker adjusted the mechanism based on the sidereal hour angle of the true sun.

为了精确计时，制表师根据太阳的恒星时角调整了机制。

作文

The study of celestial mechanics and astronomy often requires a deep understanding of various astronomical angles and measurements. One such important concept is the sidereal hour angle of the true sun, which plays a crucial role in determining the position of the sun in relation to the stars. To grasp this idea, we must first understand what is meant by the term 'sidereal.' In astronomy, 'sidereal' refers to the measurement of time based on the Earth's rotation relative to the stars, rather than the sun. This distinction is essential because it helps astronomers accurately track celestial objects over time.The sidereal hour angle of the true sun specifically refers to the angle that measures the difference between the position of the true sun and the position of a reference point in the sky, typically the vernal equinox. This angle is measured in hours, where one hour corresponds to 15 degrees of rotation. As the Earth rotates, the true sun appears to move across the sky, and its position can be tracked using this sidereal hour angle.Understanding the sidereal hour angle of the true sun is particularly important for astronomers who need to make precise observations of solar phenomena. For example, during solar eclipses, knowing the exact position of the true sun can help predict when and where the eclipse will be visible. Similarly, for navigators and those involved in satellite communications, accurate knowledge of the sun's position is vital for ensuring successful operations.Moreover, the sidereal hour angle of the true sun is also significant in the context of timekeeping. Traditional clocks measure time based on the sun's position, leading to solar time, which can vary depending on one's geographical location. However, sidereal time provides a more uniform measurement that is consistent across different locations. This is crucial for scientific research and various technological applications that require precise timing.In practical terms, calculating the sidereal hour angle of the true sun involves using complex mathematical formulas that take into account factors such as the observer's longitude and the date of observation. Astronomers use ephemerides, which are tables that provide the positions of celestial bodies at specific times, to aid in these calculations. By converting local solar time to sidereal time, astronomers can determine the precise hour angle of the true sun, enhancing their ability to conduct accurate observations.In conclusion, the sidereal hour angle of the true sun is a fundamental concept in astronomy that bridges the gap between celestial mechanics and practical applications. It not only aids in tracking the sun's position but also plays a significant role in navigation, timekeeping, and scientific research. As our understanding of the universe continues to evolve, the importance of such astronomical measurements will undoubtedly remain a cornerstone of both theoretical and applied astronomy.

天文学和天体力学的研究通常需要深入理解各种天文角度和测量方法。其中一个重要的概念是真太阳的恒星时角，它在确定太阳相对于恒星的位置方面起着关键作用。要理解这一概念，我们首先必须明白“恒星”一词的含义。在天文学中，“恒星”指的是基于地球相对于恒星的自转来测量时间，而不是基于太阳。这一区别至关重要，因为它帮助天文学家准确跟踪随时间变化的天体。真太阳的恒星时角特别指的是测量真太阳位置与天空中参考点（通常是春分点）之间的角度。这个角度以小时为单位测量，其中一个小时对应15度的旋转。随着地球的自转，真太阳似乎在天空中移动，其位置可以通过这个恒星时角进行追踪。理解真太阳的恒星时角对需要精确观测太阳现象的天文学家尤其重要。例如，在日食期间，知道真太阳的确切位置可以帮助预测日食何时何地可见。同样，对于导航员和参与卫星通信的人来说，准确了解太阳的位置对于确保成功操作至关重要。此外，真太阳的恒星时角在计时的背景下也具有重要意义。传统时钟根据太阳的位置来测量时间，导致太阳时间，这可能因地理位置而异。然而，恒星时间提供了一种更统一的测量方式，在不同地点之间保持一致。这对科学研究和各种需要精确计时的技术应用至关重要。在实际操作中，计算真太阳的恒星时角涉及使用复杂的数学公式，这些公式考虑了观察者的经度和观察日期等因素。天文学家使用历书，即提供特定时间天体位置的表格，来帮助进行这些计算。通过将地方太阳时间转换为恒星时间，天文学家可以确定真太阳的精确时角，从而增强他们进行准确观测的能力。总之，真太阳的恒星时角是天文学中的一个基本概念，它架起了天体力学与实际应用之间的桥梁。它不仅有助于追踪太阳的位置，而且在导航、计时和科学研究中也发挥着重要作用。随着我们对宇宙的理解不断发展，这类天文测量的重要性无疑将继续成为理论和应用天文学的基石。