sidereal system

简明释义

恒星系

英英释义

例句

1.Using the sidereal system, astronomers can predict the positions of stars with great accuracy.

利用恒星系统，天文学家可以非常准确地预测星星的位置。

2.In navigation, understanding the sidereal system can help determine one’s position using celestial bodies.

在导航中，理解恒星系统可以帮助通过天体确定自己的位置。

3.The sidereal system differs from the solar system as it focuses on fixed stars rather than the sun.

与太阳系不同，恒星系统侧重于固定的星星，而不是太阳。

4.The sidereal system is based on the rotation of the Earth relative to distant stars.

这恒星系统是基于地球相对于遥远星星的旋转。

5.Astronomers often use the sidereal system to measure the positions of stars in the night sky.

天文学家经常使用恒星系统来测量夜空中星星的位置。

作文

The universe is a vast and complex place, filled with mysteries that have fascinated humanity for centuries. One of the most intriguing concepts in astronomy is the sidereal system, which refers to the measurement of time and the positioning of celestial bodies in relation to the stars. Unlike the solar system, which is based on the movements of the Sun and planets, the sidereal system focuses on the stars' positions as a reference point for navigation and timekeeping.In ancient times, civilizations relied heavily on the stars to guide their travels and agricultural practices. The sidereal system allowed them to create calendars based on the constellations and the changing seasons. For instance, the Egyptians used a sidereal calendar to predict the annual flooding of the Nile River, which was crucial for their farming activities. Similarly, the Mayans developed a sophisticated understanding of the stars, which played a significant role in their cultural and religious practices.The importance of the sidereal system extends beyond ancient civilizations. In modern astronomy, it serves as a fundamental framework for understanding the cosmos. Astronomers use the sidereal system to track the movements of celestial objects, such as stars, galaxies, and other astronomical phenomena. By measuring the time it takes for a star to return to the same position in the sky, they can determine its sidereal period, which is essential for studying the dynamics of celestial bodies.Additionally, the sidereal system plays a critical role in navigation. Sailors and explorers have long relied on the stars to find their way across the oceans. By using a sextant to measure the angle between a star and the horizon, navigators can calculate their latitude and longitude. This method, rooted in the principles of the sidereal system, has been instrumental in maritime exploration and trade.Moreover, the sidereal system has implications for our understanding of time itself. The concept of a sidereal day, which is approximately 23 hours and 56 minutes, differs from the solar day we commonly use, which is 24 hours. This discrepancy arises because the Earth not only rotates on its axis but also moves along its orbit around the Sun. As a result, the sidereal system provides a more accurate representation of the Earth's rotation in relation to distant stars.In conclusion, the sidereal system is a vital aspect of astronomy that has shaped our understanding of the universe. From ancient civilizations to modern scientific practices, the measurement of time and the positioning of celestial bodies in relation to the stars have played a crucial role in navigation, agriculture, and our comprehension of time. As we continue to explore the cosmos, the sidereal system remains an essential tool for astronomers and navigators alike, reminding us of our deep connection to the stars above.

宇宙是一个广阔而复杂的地方，充满了几个世纪以来吸引人类的神秘。天文学中最引人入胜的概念之一是恒星系统，它指的是根据星星的位置来测量时间和天体的相对位置。与基于太阳和行星运动的太阳系不同，恒星系统将星星的位置作为导航和计时的参考点。在古代，文明在很大程度上依赖星星来指导他们的旅行和农业实践。恒星系统使他们能够根据星座和季节的变化创建日历。例如，埃及人使用恒星日历来预测尼罗河的年度泛滥，这对他们的农业活动至关重要。同样，玛雅人发展出对星星的复杂理解，这在他们的文化和宗教实践中发挥了重要作用。恒星系统的重要性超越了古代文明。在现代天文学中，它作为理解宇宙的基本框架。天文学家使用恒星系统来跟踪天体的运动，如恒星、星系和其他天文现象。通过测量一颗星星返回天空中相同位置所需的时间，他们可以确定其恒星周期，这对于研究天体的动态至关重要。此外，恒星系统在导航中发挥着关键作用。水手和探险者长期以来一直依赖星星在海洋中找到方向。通过使用六分仪测量一颗星星与地平线之间的角度，导航员可以计算他们的纬度和经度。这种方法根植于恒星系统的原则，对于海洋探索和贸易至关重要。此外，恒星系统对我们理解时间本身也有影响。恒星日的概念大约为23小时56分钟，与我们通常使用的太阳日（24小时）不同。这种差异产生的原因是地球不仅绕其轴旋转，还沿着其围绕太阳的轨道运动。因此，恒星系统提供了一个更准确的地球相对于遥远星星的旋转表示。总之，恒星系统是天文学中的一个重要方面，塑造了我们对宇宙的理解。从古代文明到现代科学实践，时间的测量和天体相对于星星的位置在导航、农业以及我们对时间的理解中发挥了至关重要的作用。随着我们继续探索宇宙，恒星系统仍然是天文学家和导航员的重要工具，提醒我们与头顶的星星之间的深厚联系。