astronomic longitude

简明释义

1. 黄经; 2. 天文经度;

英英释义

例句

1.To successfully launch a satellite, engineers must calculate its astronomic longitude (天文经度) precisely.

为了成功发射卫星，工程师必须精确计算其天文经度。

2.In ancient navigation, sailors relied heavily on astronomic longitude (天文经度) to find their way across the oceans.

在古代航海中，水手们非常依赖天文经度来找到穿越海洋的路线。

3.Understanding astronomic longitude (天文经度) is essential for accurate map-making.

理解天文经度对准确制图至关重要。

4.The navigator used the stars to calculate his position, relying on the principles of astronomic longitude (天文经度).

导航员利用星星计算自己的位置，依赖于天文经度的原理。

5.The concept of astronomic longitude (天文经度) helps astronomers track celestial events.

天文经度的概念帮助天文学家追踪天体事件。

作文

The concept of astronomic longitude is fundamental to our understanding of geography and navigation. It refers to the angular distance of a point on the Earth's surface, measured east or west from the Prime Meridian, which is defined as 0 degrees longitude. This measurement is crucial for determining one’s position on the globe and plays a vital role in various fields, including cartography, astronomy, and global positioning systems (GPS).To better understand astronomic longitude, we need to delve into its historical significance. The determination of longitude was one of the great challenges faced by navigators during the Age of Exploration. Unlike latitude, which can be easily calculated by observing the North Star, finding accurate longitude required precise timekeeping. Sailors needed a reliable way to measure time at sea, which led to the invention of the marine chronometer by John Harrison in the 18th century. This breakthrough allowed sailors to calculate their astronomic longitude accurately, enabling safer and more efficient voyages across the oceans.In modern times, astronomic longitude remains essential for navigation and mapping. With the advent of satellite technology and GPS, determining one’s longitude has become significantly easier. GPS devices use signals from multiple satellites to triangulate a user’s exact position, providing real-time data on both latitude and longitude. However, the underlying principles of astronomic longitude still apply, as these systems rely on the same geographical coordinates that have been used for centuries.Understanding astronomic longitude is not just about navigation; it also has implications for timekeeping and international relations. The world is divided into time zones based on lines of longitude, with each zone typically spanning 15 degrees. This division allows for standardized timekeeping across different regions, facilitating communication and commerce. However, political boundaries often disrupt these zones, leading to inconsistencies in local time. For instance, some countries may choose to adopt a time zone that does not align perfectly with their astronomic longitude, resulting in a significant difference between the local time and what the longitude would suggest.Moreover, astronomic longitude is crucial in scientific research, particularly in fields such as astronomy and environmental science. Astronomers rely on precise measurements of longitude to track celestial bodies and understand their movements relative to Earth. Environmental scientists may use longitude data to study climate patterns, biodiversity, and ecological changes across different regions.In conclusion, the term astronomic longitude encompasses much more than just a point on a map. It is a key element in navigation, timekeeping, and scientific research, deeply rooted in history and continually relevant in today’s technological landscape. As we continue to explore and understand our planet, the significance of astronomic longitude will remain an integral part of our global perspective, guiding us in our journeys both on land and at sea.

“天文经度”的概念是我们理解地理和导航的基础。它指的是地球表面某一点的角距离，向东或向西测量，自本初子午线起算，本初子午线被定义为0度经度。这一测量对于确定一个人在地球上的位置至关重要，并在制图、天文学和全球定位系统（GPS）等多个领域发挥着重要作用。为了更好地理解天文经度，我们需要深入探讨其历史意义。在探索时代，确定经度是航海者面临的重大挑战之一。与可以通过观察北极星轻松计算的纬度不同，精确找到经度需要精确的计时。水手们需要一种可靠的方法来测量海上的时间，这导致了约翰·哈里森在18世纪发明了海洋计时器。这一突破使得水手能够准确计算他们的天文经度，从而使跨洋航行更加安全和高效。在现代，天文经度仍然对导航和制图至关重要。随着卫星技术和GPS的出现，确定一个人的经度变得显著容易。GPS设备利用来自多个卫星的信号来三角测量用户的确切位置，提供实时的纬度和经度数据。然而，天文经度的基本原理仍然适用，因为这些系统依赖于几个世纪以来使用的相同地理坐标。理解天文经度不仅仅是关于导航；它还对计时和国际关系具有重要影响。世界被划分为基于经度线的时区，每个时区通常跨越15度。这种划分允许不同地区之间的标准化计时，促进沟通和商业。然而，政治边界常常打乱这些时区，导致当地时间的不一致。例如，一些国家可能选择采用与其天文经度不完全一致的时区，从而导致当地时间与经度所建议的时间之间存在显著差异。此外，天文经度在科学研究中也至关重要，特别是在天文学和环境科学等领域。天文学家依靠精确的经度测量来追踪天体并理解它们相对于地球的运动。环境科学家可能会利用经度数据来研究不同地区的气候模式、生物多样性和生态变化。总之，术语天文经度不仅仅涵盖地图上的一个点。它是导航、计时和科学研究的关键元素，深深植根于历史中，并在当今的科技背景下持续相关。随着我们继续探索和理解我们的星球，天文经度的重要性将始终是我们全球视角的一个组成部分，引导我们在陆地和海洋上的旅程。