celestial navigation

简明释义

天文航海

英英释义

例句

1.Many modern sailors still practice celestial navigation as a backup method.

许多现代水手仍然将天文导航作为备份方法进行练习。

2.Astronomy plays a key role in celestial navigation, helping navigators determine their position.

天文学在天文导航中起着关键作用，帮助导航员确定他们的位置。

3.Sailors often rely on celestial navigation to find their way across the open ocean.

水手们常常依赖天文导航在开阔的海洋中找到方向。

4.In survival situations, knowing celestial navigation can be a lifesaver.

在生存情况下，了解天文导航可能会拯救生命。

5.The ancient Polynesians mastered celestial navigation to explore the vast Pacific Ocean.

古代波利尼西亚人掌握了天文导航来探索广阔的太平洋。

作文

Celestial navigation, or 天文导航, is an ancient method of determining one’s position on Earth by observing the positions of celestial bodies such as stars, planets, the moon, and the sun. This technique has been used for centuries by sailors, explorers, and navigators to traverse vast oceans and uncharted territories. The practice of 天文导航 relies on a deep understanding of astronomy and mathematics, making it both an art and a science.The origins of 天文导航 can be traced back to ancient civilizations. The Polynesians, for instance, were skilled navigators who used the stars to guide their way across the Pacific Ocean. They memorized the positions of various stars and constellations, allowing them to travel thousands of miles without modern navigational tools. Similarly, the Greeks and Romans developed their own methods of 天文导航, using instruments like the astrolabe to measure the angle of celestial bodies above the horizon.In the Age of Exploration, 天文导航 became crucial for European explorers. Navigators like Ferdinand Magellan and Christopher Columbus relied heavily on this technique to chart their courses across the Atlantic and Pacific Oceans. By measuring the angle of the sun at noon and the positions of stars at night, they could determine their latitude and longitude, enabling them to navigate with greater accuracy than ever before.One of the key components of 天文导航 is the concept of the celestial sphere. This imaginary sphere surrounds the Earth and holds all celestial bodies in fixed positions. By understanding the relationship between the celestial sphere and the Earth, navigators can make precise calculations to find their position. For example, if a navigator knows the time and can observe a star’s altitude, they can calculate their latitude. To determine their longitude, however, they need to have an accurate timepiece, which was a significant challenge before the invention of marine chronometers.Despite the advent of modern technology, such as GPS and electronic navigation systems, the principles of 天文导航 remain relevant today. Many sailing schools still teach this ancient art to students, emphasizing its importance in understanding the fundamentals of navigation. Additionally, in situations where electronic devices fail or are unavailable, having knowledge of 天文导航 can be a lifesaver.Furthermore, 天文导航 fosters a deeper appreciation for the natural world. It encourages individuals to look up at the night sky and recognize the patterns and movements of celestial bodies. This connection to the universe can be both humbling and inspiring, reminding us of our place in the cosmos.In conclusion, 天文导航 is a remarkable skill that combines science, art, and history. Its significance extends beyond mere navigation; it connects us to our ancestors and the vastness of the universe. By understanding and practicing 天文导航, we not only preserve an invaluable tradition but also enrich our experience of exploring the world around us.