apparent right ascension

简明释义

视赤经

英英释义

例句

1.The astronomer calculated the apparent right ascension 视在赤经 of the star to determine its position in the night sky.

天文学家计算了这颗星星的视在赤经以确定它在夜空中的位置。

2.In astrometry, obtaining the apparent right ascension 视在赤经 is crucial for mapping stars accurately.

在天体测量学中，获取视在赤经对于准确绘制星图至关重要。

3.The apparent right ascension 视在赤经 helps astronomers predict when a star will be visible in the evening sky.

这视在赤经帮助天文学家预测一颗星星何时会在晚上的天空中可见。

4.To find the celestial object, you need to know its apparent right ascension 视在赤经 and declination.

要找到这个天体，你需要知道它的视在赤经和赤纬。

5.The telescope was set up to track the apparent right ascension 视在赤经 of Jupiter as it moved across the sky.

望远镜被设置为跟踪木星的视在赤经，因为它在天空中移动。

作文

In the field of astronomy, understanding celestial coordinates is essential for locating stars and other celestial bodies in the night sky. One of the key components of this coordinate system is the concept of right ascension, which is analogous to longitude on Earth. However, an important distinction must be made between 'right ascension' and 'apparent right ascension'. The term apparent right ascension refers to the position of a celestial object as observed from Earth, taking into account the effects of atmospheric refraction and the motion of the observer. This is crucial for astronomers who need precise measurements for their observations.The celestial sphere is divided into two main coordinates: declination and right ascension. While right ascension is typically measured in hours, minutes, and seconds, apparent right ascension specifically refers to the actual observed position of a star at a given moment in time. This means that the apparent right ascension can vary slightly due to several factors, such as the Earth's axial tilt and its elliptical orbit around the Sun.One of the most significant implications of apparent right ascension is its impact on navigation and timekeeping. Historically, sailors relied on the positions of stars to navigate the oceans, and accurate knowledge of apparent right ascension was vital for determining their location. Even today, modern navigation systems utilize principles derived from these ancient methods, underscoring the importance of understanding celestial mechanics.Moreover, the concept of apparent right ascension plays a crucial role in astrophysics and cosmology. When studying distant galaxies or supernovae, researchers must account for the apparent right ascension of these objects to ensure accurate data collection. This precision is necessary for constructing models of the universe's expansion and understanding the fundamental laws of physics.Astronomers also use software and tools that calculate apparent right ascension based on observational data. These tools help researchers visualize the positions of celestial objects in real-time, making it easier to plan observations and conduct research. As technology advances, the accuracy of apparent right ascension calculations continues to improve, allowing for deeper insights into the cosmos.In conclusion, the term apparent right ascension embodies a critical aspect of astronomical observation and navigation. By recognizing the difference between apparent and standard right ascension, one can appreciate the complexities involved in accurately locating celestial bodies. Whether for practical navigation or theoretical research, mastering the concept of apparent right ascension is indispensable for anyone interested in the wonders of the universe. As we continue to explore the cosmos, understanding such terms will enhance our ability to uncover the mysteries of space and time.

在天文学领域，理解天体坐标对于在夜空中定位星星和其他天体至关重要。这个坐标系统的一个关键组成部分是赤经的概念，它类似于地球上的经度。然而，必须对“赤经”和“视赤经”之间做出重要区分。术语视赤经指的是从地球观察到的天体位置，考虑了大气折射和观察者运动的影响。这对于需要精确测量其观测结果的天文学家来说至关重要。天球被划分为两个主要坐标：赤纬和赤经。虽然赤经通常以小时、分钟和秒为单位测量，但视赤经特指在给定时间点上天体的实际观察位置。这意味着视赤经可能会因多种因素而略有变化，例如地球的轴倾角及其围绕太阳的椭圆轨道。视赤经的一个重要影响是它对导航和计时的影响。从历史上看，水手依靠星星的位置在海洋中导航，准确了解视赤经对于确定他们的位置至关重要。即使在今天，现代导航系统也利用这些古老方法衍生出的原理，突显了理解天体力学的重要性。此外，视赤经的概念在天体物理学和宇宙学中也发挥着至关重要的作用。在研究遥远的星系或超新星时，研究人员必须考虑这些天体的视赤经以确保数据收集的准确性。这种精确性对于构建宇宙膨胀模型和理解物理学基本法则是必要的。天文学家还使用计算软件和工具，根据观测数据计算视赤经。这些工具帮助研究人员实时可视化天体的位置，使得规划观测和进行研究变得更加容易。随着技术的进步，视赤经计算的准确性不断提高，从而使我们能够深入洞察宇宙。总之，术语视赤经体现了天文观测和导航的一个关键方面。通过认识到视赤经与标准赤经之间的区别，人们可以欣赏到准确定位天体所涉及的复杂性。无论是为了实用导航还是理论研究，掌握视赤经的概念对于任何对宇宙奇观感兴趣的人来说都是不可或缺的。随着我们继续探索宇宙，理解这样的术语将增强我们揭示空间和时间奥秘的能力。