meridian altitude

简明释义

中天高度中天高度子午线高度

英英释义

例句

1.Navigators use the meridian altitude of celestial bodies to help with their course corrections.

航海者利用天体的子午线高度来帮助他们进行航向修正。

2.At noon, the sun reaches its highest meridian altitude, providing the most direct sunlight.

在中午，太阳达到最高的子午线高度，提供最直接的阳光。

3.The meridian altitude of the moon can vary greatly depending on the time of year.

月亮的子午线高度会因季节而有很大变化。

4.To find your latitude, you can measure the meridian altitude of the sun at noon.

要找到你的纬度，可以在中午测量太阳的子午线高度。

5.The astronomer calculated the meridian altitude of the star to determine its position in the sky.

天文学家计算了星星的子午线高度以确定其在天空中的位置。

作文

The concept of meridian altitude refers to the highest point that a celestial body reaches in the sky when it crosses the observer's local meridian. This phenomenon is crucial for understanding the position of stars and planets in the night sky. For astronomers and navigators, knowing the meridian altitude of a celestial object is essential for accurate observations and calculations. When an object reaches its meridian altitude, it is at its most visible and can be observed at the least amount of atmospheric distortion. This is because the object is positioned directly overhead, allowing for a clearer view without interference from the Earth's atmosphere. This clarity is particularly important for astronomers who rely on precise measurements to study celestial phenomena. In practical terms, the meridian altitude can be calculated using various methods, including the use of sextants or modern astronomical software. By determining the angle at which a celestial body appears above the horizon at its highest point, observers can gain valuable insights into the object's distance and trajectory. Additionally, the meridian altitude plays a significant role in navigation. Sailors have historically used the positions of stars at their meridian altitude to determine their latitude while at sea. By observing the height of a star above the horizon at noon, navigators could accurately plot their position on a map. This practice is still relevant today, as many navigators and sailors continue to use traditional methods alongside modern technology. Understanding the meridian altitude is also beneficial for amateur astronomers. By knowing when a celestial body will reach its highest point in the sky, enthusiasts can plan their observations more effectively. This knowledge allows them to maximize their viewing experience, ensuring they catch the best moments of visibility for their favorite stars or planets. Furthermore, the meridian altitude varies depending on the observer's geographical location. For example, observers located near the equator will see celestial objects reach a higher meridian altitude compared to those situated at higher latitudes. This variation adds another layer of complexity to astronomical observations, as it requires observers to adjust their expectations based on their specific location. In conclusion, the term meridian altitude is not just a scientific concept; it is a fundamental aspect of astronomy and navigation that has practical implications for both professionals and amateurs alike. Whether one is charting a course across the ocean or gazing up at the stars, understanding the meridian altitude enhances our appreciation of the universe and our place within it. As we continue to explore the cosmos, the significance of this term will undoubtedly remain a cornerstone of astronomical study and navigation practices.

“子午线高度”这一概念指的是天体在穿过观察者的当地子午线时达到的最高点。这一现象对于理解星星和行星在夜空中的位置至关重要。对于天文学家和航海者来说，了解一个天体的“子午线高度”对准确观察和计算至关重要。当一个天体达到其“子午线高度”时，它处于最可见的位置，并且可以在大气失真最小的情况下观察到。这是因为该天体正好位于头顶上方，允许更清晰的视野，而不会受到地球大气的干扰。这种清晰度对于依赖精确测量来研究天文现象的天文学家尤其重要。在实际操作中，“子午线高度”可以通过多种方法进行计算，包括使用六分仪或现代天文学软件。通过确定天体在其最高点时出现在地平线上的角度，观察者可以获得有关该天体距离和轨迹的宝贵见解。此外，“子午线高度”在导航中也发挥着重要作用。历史上，水手们利用天体在其“子午线高度”时的位置来确定他们在海上的纬度。通过观察一颗星星在正午时高于地平线的高度，导航员可以准确地在地图上绘制他们的位置。这一做法至今仍然相关，许多导航员和水手继续结合传统方法与现代技术。理解“子午线高度”对业余天文学爱好者也大有裨益。通过了解天体何时会达到其在天空中的最高点，爱好者可以更有效地规划观察活动。这一知识使他们能够最大限度地提高观赏体验，确保他们能够捕捉到他们最喜欢的星星或行星的最佳可见时刻。此外，“子午线高度”因观察者的地理位置而异。例如，位于赤道附近的观察者将看到天体达到比位于高纬度地区的观察者更高的“子午线高度”。这种变化为天文观察增加了另一层复杂性，因为它要求观察者根据特定位置调整期望。总之，“子午线高度”一词不仅仅是一个科学概念；它是天文学和导航的基本方面，对专业人士和业余爱好者都有实用意义。无论是跨越海洋的航行，还是仰望星空，理解“子午线高度”都增强了我们对宇宙及其在其中的位置的欣赏。随着我们继续探索宇宙，这一术语的重要性无疑将继续成为天文学研究和导航实践的基石。