right ascension of the observer's meridian

简明释义

测者子午线赤经

英英释义

例句

1.Astronomers often refer to the right ascension of the observer's meridian when mapping celestial objects in the night sky (观察者子午线的视黄经).

天文学家在绘制夜空中的天体时，常常提到观察者子午线的视黄经。

2.The right ascension of the observer's meridian helps in aligning telescopes for stargazing events (观察者子午线的视黄经).

对于观星活动，观察者子午线的视黄经有助于调整望远镜的对准。

3.During the lecture, the professor explained the significance of the right ascension of the observer's meridian in celestial navigation (观察者子午线的视黄经).

在讲座中，教授解释了观察者子午线的视黄经在天文导航中的重要性。

4.To accurately determine the position of a star, we need to calculate the right ascension of the observer's meridian (观察者子午线的视黄经).

为了准确确定一颗星星的位置，我们需要计算观察者子午线的视黄经。

5.When observing planets, knowing the right ascension of the observer's meridian is crucial for accurate tracking (观察者子午线的视黄经).

在观察行星时，了解观察者子午线的视黄经对于准确追踪至关重要。

作文

In the realm of astronomy, understanding celestial coordinates is crucial for both amateur stargazers and professional astronomers alike. One of the key components of these coordinates is the concept of right ascension, which is analogous to longitude on Earth but applied to the celestial sphere. The term right ascension of the observer's meridian refers specifically to the angle measured eastward along the celestial equator from the vernal equinox to the point where the observer's meridian intersects the celestial equator. This measurement is essential for accurately locating celestial objects in the night sky.To grasp the significance of right ascension of the observer's meridian, it is important to first understand what is meant by the observer's meridian. The observer's meridian is an imaginary line that runs from the North Celestial Pole to the South Celestial Pole, passing directly overhead through the observer's zenith. This line is crucial because it represents the local reference point for any observations made by the observer. As the Earth rotates, different stars and celestial bodies cross this meridian, and their positions can be tracked using the right ascension coordinate.Right ascension is measured in hours, minutes, and seconds, with one hour corresponding to 15 degrees of angular distance. This system allows astronomers to pinpoint the location of stars and other celestial objects with great precision. When we talk about the right ascension of the observer's meridian, we are essentially determining the position of the celestial objects as they transit the observer's meridian at a specific time. This is particularly useful for planning observations, as certain objects may only be visible during specific times of the night when they cross the meridian.For example, if an observer wants to view a particular star, knowing its right ascension of the observer's meridian allows them to calculate when the star will be at its highest point in the sky, making it easier to observe. This is especially relevant for astrophotography, where timing can be critical to capturing the best images of celestial phenomena.Furthermore, the concept of right ascension of the observer's meridian plays a significant role in various astronomical calculations, including the determination of local sidereal time. Local sidereal time is a measure of the angle between the observer's meridian and the vernal equinox, expressed in hours, and it is directly related to the right ascension of objects crossing the meridian. By knowing the local sidereal time, astronomers can easily identify which stars are currently visible in the night sky based on their right ascension values.In conclusion, the right ascension of the observer's meridian is a fundamental concept in the field of astronomy that enhances our ability to locate and observe celestial objects. It connects the observer's location on Earth with the vastness of the universe, allowing for precise tracking of stars and other celestial phenomena. By mastering this concept, both novice and experienced astronomers can improve their observational skills and deepen their appreciation for the wonders of the cosmos.

在天文学领域，理解天体坐标对业余天文爱好者和专业天文学家来说都至关重要。这些坐标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，但应用于天球。术语观察者子午线的赤经特指从春分点沿天球赤道向东测量的角度，直到观察者的子午线与天球赤道相交的点。这一测量对于准确定位夜空中的天体至关重要。要理解观察者子午线的赤经的重要性，首先需要了解观察者的子午线是什么意思。观察者的子午线是一条想象中的线，从北天极到南天极，穿过观察者的天顶。这条线至关重要，因为它代表了观察者进行任何观测时的本地参考点。随着地球的旋转，不同的星星和天体会穿越这一子午线，它们的位置可以通过赤经坐标进行追踪。赤经以小时、分钟和秒为单位进行测量，其中一小时对应15度的角度距离。这一系统使天文学家能够精确地确定星星和其他天体的位置。当我们谈论观察者子午线的赤经时，我们实际上是在确定特定时间天体穿越观察者子午线的位置。这对于规划观测尤其有用，因为某些天体可能仅在它们穿越子午线时可见。例如，如果观察者想要观察某颗特定的星星，知道其观察者子午线的赤经可以让他们计算出该星星在夜空中最高点的时间，从而更容易进行观测。这对于天文摄影尤其相关，因为时机对于捕捉天体现象的最佳图像至关重要。此外，观察者子午线的赤经的概念在各种天文计算中也扮演着重要角色，包括地方恒星时的确定。地方恒星时是观察者子午线与春分点之间的角度测量，以小时表示，并且与穿越子午线的天体的赤经值直接相关。通过知道地方恒星时，天文学家可以轻松识别当前夜空中哪些星星是可见的，这取决于它们的赤经值。总之，观察者子午线的赤经是天文学领域的一个基本概念，它增强了我们定位和观察天体的能力。它将观察者在地球上的位置与宇宙的浩瀚连接起来，使得对星星和其他天体现象的精确追踪成为可能。通过掌握这一概念，无论是新手还是经验丰富的天文学家都可以提高他们的观测技能，加深对宇宙奇观的欣赏。