astronomical mean sun

简明释义

平太阳

英英释义

例句

1.The astronomical mean sun is used in determining standard time across different time zones.

天文平均太阳用于确定不同时间区的标准时间。

2.To calculate solar noon, we need to refer to the astronomical mean sun.

为了计算太阳正午，我们需要参考天文平均太阳。

3.In astronomy, the astronomical mean sun serves as a reference point for measuring time.

在天文学中，天文平均太阳作为测量时间的参考点。

4.The time displayed on your watch is based on the position of the astronomical mean sun.

你的手表上显示的时间是基于天文平均太阳的位置。

5.The concept of the astronomical mean sun helps us understand the variations in daylight hours.

天文平均太阳的概念帮助我们理解日照时间的变化。

作文

The concept of the astronomical mean sun is a fundamental aspect of astronomy and timekeeping. It refers to an imaginary point in the sky that represents the average position of the sun throughout the year. This average position is crucial for creating a stable reference for measuring time, especially before the advent of modern technology. Understanding the astronomical mean sun is essential for both astronomers and anyone interested in the mechanics of our solar system.At its core, the astronomical mean sun serves as a baseline for calculating solar time. Unlike the actual sun, which moves irregularly across the sky due to the elliptical shape of Earth's orbit and its axial tilt, the astronomical mean sun follows a consistent path, making it easier to use for timekeeping purposes. This consistency allows for the establishment of standard time zones and helps synchronize clocks worldwide.The significance of the astronomical mean sun can be traced back to ancient civilizations, which relied heavily on celestial bodies for navigation and agriculture. Farmers would observe the sun's position to determine the best times for planting and harvesting crops. The invention of sundials was a significant advancement, allowing people to tell time based on the sun's movement. However, these methods were often imprecise due to the sun's varying speed and position in the sky.To address these inconsistencies, astronomers developed the concept of the astronomical mean sun, which averages out the sun's apparent motion over the course of a year. This concept is vital for the creation of the mean solar day, which is defined as 24 hours long. By using the astronomical mean sun as a reference point, timekeepers could establish a more reliable system for measuring time, leading to the development of mechanical clocks and eventually, atomic clocks.In contemporary society, the astronomical mean sun continues to play a crucial role in our understanding of time and astronomy. It is used in various calculations, such as determining the length of a day and the timing of seasons. Furthermore, it is essential for GPS technology, which relies on precise timing to provide accurate location data. Without the concept of the astronomical mean sun, many aspects of modern life would be far less efficient and more chaotic.Moreover, the astronomical mean sun also has implications for our understanding of climate and environmental science. By studying the patterns of solar radiation and its relationship with Earth's orbit, scientists can better predict climate changes and their potential impacts on ecosystems. This knowledge is increasingly important as we face global challenges such as climate change and resource management.In conclusion, the astronomical mean sun is not just a theoretical concept but a practical tool that has shaped human civilization for centuries. From ancient agricultural practices to modern technological advancements, its influence is pervasive. As we continue to explore the universe and our place within it, the understanding of the astronomical mean sun will remain a cornerstone of both scientific inquiry and everyday life. By appreciating this concept, we can better understand the intricate dance of celestial bodies and their impact on our planet, ultimately enhancing our connection to the universe around us.

“天文平均太阳”的概念是天文学和时间测量的一个基本方面。它指的是天空中一个虚构的点，表示太阳在一年中的平均位置。这个平均位置对于创建一个稳定的时间测量参考至关重要，尤其是在现代技术出现之前。理解“天文平均太阳”对天文学家和任何对我们太阳系的机制感兴趣的人来说都是必不可少的。在其核心，“天文平均太阳”作为计算太阳时间的基准。与实际太阳不同，实际太阳由于地球轨道的椭圆形状和轴倾斜而不规则地在天空中移动，而“天文平均太阳”遵循一致的路径，使其更容易用于时间测量目的。这种一致性允许建立标准时区，并帮助全球同步时钟。“天文平均太阳”的重要性可以追溯到古代文明，这些文明在导航和农业上严重依赖天体。农民会观察太阳的位置来确定最佳的播种和收获时间。日晷的发明是一个重要的进步，使人们能够根据太阳的运动来判断时间。然而，由于太阳在天空中的速度和位置变化，这些方法往往不够精确。为了应对这些不一致性，天文学家开发了“天文平均太阳”的概念，该概念将太阳的明显运动在一年中的时间进行平均。这一概念对于创建平均太阳日至关重要，平均太阳日定义为24小时。通过使用“天文平均太阳”作为参考点，时间测量者可以建立一个更可靠的时间测量系统，从而导致机械钟表的发展，最终发展为原子钟。在当代社会，“天文平均太阳”继续在我们对时间和天文学的理解中发挥关键作用。它用于各种计算，例如确定一天的长度和季节的时间。此外，它对于GPS技术也至关重要，GPS技术依赖精确的时间提供准确的位置数据。如果没有“天文平均太阳”的概念，现代生活的许多方面将会变得更加混乱和低效。此外，“天文平均太阳”还对我们理解气候和环境科学产生影响。通过研究太阳辐射模式及其与地球轨道的关系，科学家可以更好地预测气候变化及其对生态系统的潜在影响。随着我们面临全球性挑战，如气候变化和资源管理，这种知识变得越来越重要。总之，“天文平均太阳”不仅仅是一个理论概念，而是一个实用工具，数世纪以来塑造了人类文明。从古代农业实践到现代技术进步，它的影响无处不在。随着我们继续探索宇宙及我们在其中的位置，理解“天文平均太阳”将始终是科学探究和日常生活的基石。通过欣赏这一概念，我们可以更好地理解天体的复杂舞蹈及其对我们星球的影响，最终增强我们与周围宇宙的联系。