right ascension of the mean sun

简明释义

平太阳赤经

英英释义

例句

1.To set up the telescope correctly, you need to know the right ascension of the mean sun at that moment.

要正确设置望远镜，你需要知道那一刻的平均太阳的黄经。

2.The formula for calculating the right ascension of the mean sun is essential for accurate timekeeping.

计算平均太阳的黄经的公式对于准确计时至关重要。

3.Astronomers often refer to the right ascension of the mean sun when discussing celestial coordinates.

天文学家在讨论天体坐标时常常提到平均太阳的黄经。

4.The astronomer calculated the right ascension of the mean sun to determine the exact time for the observation.

天文学家计算了平均太阳的黄经以确定观测的确切时间。

5.In navigation, understanding the right ascension of the mean sun helps sailors find their position at sea.

在导航中，理解平均太阳的黄经有助于水手在海上找到他们的位置。

作文

The concept of right ascension of the mean sun is an essential component in the field of astronomy and timekeeping. To fully grasp its significance, we must first understand the terms involved. Right ascension (RA) is a measure of the angle that indicates how far an object is located eastward along the celestial equator from the vernal equinox. It is akin to longitude on Earth but applies to celestial coordinates. The mean sun, on the other hand, is a theoretical construct that represents the average position of the sun over a year, accounting for variations due to the elliptical shape of Earth's orbit and axial tilt.In practical terms, the right ascension of the mean sun allows astronomers and navigators to determine the position of the sun at any given time. This measurement is crucial for various applications, including setting time zones, calculating solar noon, and even determining the best times for planting and harvesting crops based on sunlight availability.The concept dates back to ancient civilizations, where the movements of celestial bodies were meticulously observed. Early astronomers developed systems to predict the positions of stars and planets, which were foundational for navigation and agriculture. However, the introduction of the mean sun represented a significant advancement, as it provided a more consistent reference point for timekeeping.Today, the right ascension of the mean sun is used in conjunction with other astronomical measurements to create precise timekeeping systems. For instance, the modern definition of a second is based on the vibrations of cesium atoms. Still, the relationship between atomic time and solar time remains vital. The mean sun serves as a bridge connecting these two worlds, ensuring that our clocks remain aligned with the natural rhythms of the Earth.Understanding the right ascension of the mean sun also sheds light on the complexities of time itself. As the Earth rotates, different parts of the planet experience daylight and darkness, leading to the need for time zones. The mean sun provides a standard reference that can be universally applied, allowing people across the globe to synchronize their activities despite geographical differences.Moreover, the right ascension of the mean sun has implications beyond astronomy and timekeeping. It influences various fields, including meteorology, climatology, and even renewable energy. Solar panels, for example, are often optimized based on the sun's position throughout the day, which directly relates to the mean sun's right ascension.In conclusion, the right ascension of the mean sun is a fundamental concept that intertwines astronomy, timekeeping, and various scientific disciplines. Its development marked a pivotal moment in our understanding of the cosmos and our place within it. By comprehending this concept, we not only appreciate the intricacies of celestial mechanics but also recognize the profound impact these measurements have on our daily lives. From navigating the seas to optimizing agricultural practices, the influence of the mean sun's right ascension is felt in numerous aspects of human existence. As we continue to explore the universe, the importance of such astronomical principles will undoubtedly remain a guiding force in our quest for knowledge and understanding.

“平均太阳的视黄经”这一概念是天文学和时间测量领域的重要组成部分。要充分理解其意义，我们首先必须了解其中涉及的术语。视黄经（RA）是一个角度的度量，指示一个天体在春分点沿天球赤道向东偏移的距离。它类似于地球上的经度，但适用于天体坐标。另一方面，平均太阳是一个理论构造，代表太阳在一年中的平均位置，考虑了由于地球轨道的椭圆形状和轴倾角而产生的变化。在实际应用中，“平均太阳的视黄经”使天文学家和导航员能够确定在任何给定时间太阳的位置。这一测量对于各种应用至关重要，包括设置时区、计算太阳正午，甚至根据阳光可用性来确定最佳的种植和收获时间。这一概念可以追溯到古代文明，那时人们仔细观察天体的运动。早期的天文学家开发出预测恒星和行星位置的系统，这些系统为导航和农业奠定了基础。然而，平均太阳的引入代表了一项重大进步，因为它提供了一个更一致的时间测量参考点。如今，“平均太阳的视黄经”与其他天文测量结合使用，以创建精确的时间测量系统。例如，现代对秒的定义基于铯原子的振动。然而，原子时间与太阳时间之间的关系仍然至关重要。平均太阳作为连接这两个世界的桥梁，确保我们的时钟与地球的自然节律保持一致。理解“平均太阳的视黄经”也揭示了时间本身的复杂性。随着地球的自转，地球的不同部分经历白昼和黑夜，导致需要时区的产生。平均太阳提供了一个可以普遍应用的标准参考，使全球人们能够同步他们的活动，尽管存在地理差异。此外，“平均太阳的视黄经”还影响着天文学和时间测量之外的多个领域。它影响气象学、气候学，甚至可再生能源。例如，太阳能电池板通常根据太阳在一天中的位置进行优化，这直接与平均太阳的视黄经有关。总之，“平均太阳的视黄经”是一个基本概念，交织着天文学、时间测量和各个科学学科的发展。它的发展标志着我们对宇宙理解的重要时刻，以及我们在其中的位置。通过理解这一概念，我们不仅欣赏天体力学的复杂性，还认识到这些测量对我们日常生活的深远影响。从航海到优化农业实践，平均太阳的视黄经的影响在许多人类存在的各个方面都得到了体现。随着我们继续探索宇宙，这些天文学原理的重要性无疑将继续成为我们追求知识和理解的指导力量。