place sidereal time

简明释义

地方恒星时

英英释义

例句

1.The place sidereal time 地方恒星时间 helps navigators align their instruments accurately with the stars.

在导航中，地方恒星时间 地方恒星时间 帮助导航员准确地将他们的仪器与星星对齐。

2.The telescope's settings were adjusted according to the place sidereal time 地方恒星时间 for optimal viewing.

望远镜的设置根据地方恒星时间 地方恒星时间进行了调整，以获得最佳观测效果。

3.Using the place sidereal time 地方恒星时间, we can predict when a specific star will be visible in the night sky.

通过使用地方恒星时间 地方恒星时间，我们可以预测特定星星何时会在夜空中可见。

4.To calculate the position of a star, astronomers must first determine the place sidereal time 地方恒星时间 at their observatory.

为了计算星星的位置，天文学家必须首先确定他们天文台的地方恒星时间 地方恒星时间。

5.During the observation, we noted the place sidereal time 地方恒星时间 to ensure precise tracking of the celestial objects.

在观测期间，我们记录了地方恒星时间 地方恒星时间以确保精确跟踪天体。

作文

Understanding the concept of place sidereal time is crucial for astronomers and navigators alike. Sidereal time is a measure of the Earth's rotation relative to the stars rather than the Sun. This distinction is essential because it allows observers to determine the position of celestial objects in the night sky. The place sidereal time specifically refers to the local sidereal time at a given location on Earth, which is vital for accurately locating stars and other astronomical bodies.To grasp the significance of place sidereal time, one must first understand how it differs from solar time. Solar time is based on the position of the Sun in the sky, which influences our daily schedules. However, the stars do not move in the same way that the Sun does. Due to the Earth's axial tilt and its elliptical orbit around the Sun, the stars appear to shift slightly each day. As a result, a sidereal day is approximately 23 hours, 56 minutes, and 4 seconds long, making it about four minutes shorter than a solar day.When we talk about place sidereal time, we are referring to the specific sidereal time at a particular longitude. For instance, if you are located at a longitude of 0 degrees, your place sidereal time would be the same as Greenwich Mean Sidereal Time (GMST). However, if you were at a different longitude, you would need to adjust the GMST by adding or subtracting a certain amount of time based on your position.This adjustment is crucial for astronomers who wish to observe celestial events. For instance, if an astronomer in New York City wants to observe a particular star, they must calculate the place sidereal time to determine when that star will be above the horizon. By knowing the local sidereal time, they can plan their observations more effectively, ensuring that they do not miss important celestial phenomena.Moreover, place sidereal time plays a significant role in navigation, especially in maritime contexts. Sailors often rely on celestial navigation techniques to determine their position at sea. By using a sextant to measure the angle between a star and the horizon, they can calculate their latitude. However, to find their longitude, they need to know the place sidereal time at their location. This information allows them to compare their local time with the time at a known reference point, such as Greenwich, enabling them to pinpoint their exact position.In conclusion, the concept of place sidereal time is indispensable for anyone involved in astronomy or navigation. It provides a framework for understanding the movements of celestial bodies and enables precise calculations necessary for observation and navigation. Whether you are stargazing from your backyard or navigating the open seas, recognizing the importance of place sidereal time can enhance your experience and understanding of the cosmos. As we continue to explore the universe, this knowledge will remain vital for future discoveries and advancements in both fields.

理解地方恒星时间的概念对天文学家和导航员来说都是至关重要的。恒星时间是相对于恒星而不是太阳的地球自转的测量。这一区别非常重要，因为它使观察者能够确定夜空中天体的位置。地方恒星时间特别指的是地球上特定位置的本地恒星时间，这对于准确定位星星和其他天体至关重要。要理解地方恒星时间的重要性，首先必须了解它与太阳时间的不同。太阳时间是基于天空中太阳的位置，这影响着我们的日常安排。然而，恒星的移动方式与太阳并不相同。由于地球的轴倾角和围绕太阳的椭圆轨道，恒星每天似乎会略微移动。因此，恒星日大约为23小时56分钟和4秒，比太阳日短约四分钟。当我们谈论地方恒星时间时，我们指的是特定经度的具体恒星时间。例如，如果您位于0度经度，那么您的地方恒星时间将与格林威治标准恒星时间（GMST）相同。然而，如果您在不同的经度，则需要根据您的位置调整GMST，增加或减少一定的时间。这种调整对希望观察天文事件的天文学家至关重要。例如，如果纽约市的一位天文学家想要观察某颗特定的星星，他们必须计算地方恒星时间以确定那颗星星何时会出现在地平线上。通过知道本地恒星时间，他们可以更有效地计划观察，确保不会错过重要的天文现象。此外，地方恒星时间在航海中也扮演着重要角色，尤其是在海洋环境中。水手们通常依赖天文导航技术来确定他们在海上的位置。通过使用六分仪测量一颗星星与地平线之间的角度，他们可以计算出自己的纬度。然而，要找到他们的经度，他们需要知道自己位置的地方恒星时间。这一信息使他们能够将自己的本地时间与已知参考点（如格林威治的时间）进行比较，从而精确定位。总之，地方恒星时间的概念对任何参与天文学或导航的人都是不可或缺的。它提供了一个理解天体运动的框架，并使得观察和导航所需的精确计算成为可能。无论您是在后院仰望星空还是在公海航行，认识到地方恒星时间的重要性都可以增强您的体验和对宇宙的理解。随着我们继续探索宇宙，这一知识在未来的发现和两个领域的进步中将始终保持重要。