apparent declination

简明释义

视赤纬

英英释义

例句

1.Understanding the apparent declination is crucial for accurate star mapping.

理解表观赤纬对准确的星图绘制至关重要。

2.The apparent declination changes throughout the year due to Earth's axial tilt.

由于地球的轴倾角，表观赤纬在一年中会发生变化。

3.During the night observation, the apparent declination helped us locate the constellation.

在夜间观测中，表观赤纬帮助我们定位了星座。

4.The telescope's settings were adjusted based on the apparent declination of the celestial object.

望远镜的设置根据天体的表观赤纬进行了调整。

5.The astronomer calculated the apparent declination of the star to determine its position in the sky.

天文学家计算了星星的表观赤纬以确定其在天空中的位置。

作文

In the study of astronomy, one often encounters various terms that describe celestial phenomena. One such term is apparent declination, which refers to the angle between an object in the sky and the celestial equator as observed from a specific location on Earth. This concept is crucial for astronomers and navigators alike, as it helps in locating stars and other celestial bodies in the night sky. Understanding apparent declination requires a grasp of the celestial coordinate system, which is akin to latitude and longitude on Earth but applied to the celestial sphere.The celestial sphere is an imaginary sphere surrounding the Earth, onto which all celestial bodies are projected. The celestial equator is the projection of the Earth's equator onto this sphere. When we talk about apparent declination, we are essentially discussing how far north or south a celestial object is from this equatorial plane. For instance, a star with a declination of +30 degrees is located 30 degrees north of the celestial equator, while a star with a declination of -30 degrees is 30 degrees south.The significance of apparent declination extends beyond mere observation. It plays a vital role in the field of astrometry, which is the measurement of the positions and movements of celestial bodies. By knowing the apparent declination of a star, astronomers can calculate its position in the sky at any given time. This calculation is essential for various applications, including satellite positioning, navigation, and even understanding the dynamics of our galaxy.Moreover, apparent declination is not static; it can change due to several factors, such as precession and nutation. Precession refers to the gradual shift in the orientation of the Earth's axis, which affects the coordinates of stars over long periods. Nutation is a smaller, periodic oscillation of the Earth's axis that also influences the apparent positions of celestial objects. Therefore, astronomers must account for these changes when determining the apparent declination of stars and other celestial bodies.For amateur astronomers, understanding apparent declination can enhance their stargazing experience. By using star charts or astronomy apps that provide the declination of various stars, they can locate these objects more easily. Knowing the apparent declination helps in setting up telescopes and aligning them accurately to track celestial objects as they move across the sky.In conclusion, apparent declination is a fundamental concept in astronomy that aids in the observation and understanding of celestial objects. Whether one is a professional astronomer or an enthusiastic amateur, grasping the idea of apparent declination enriches the experience of exploring the universe. As we continue to advance our knowledge of the cosmos, the importance of such concepts will only grow, allowing us to appreciate the beauty and complexity of the universe we inhabit.

在天文学研究中，常常会遇到各种描述天体现象的术语。其中一个术语是表观赤纬，它指的是从地球特定位置观察到的天空中物体与天球赤道之间的角度。这个概念对于天文学家和导航员来说至关重要，因为它有助于定位夜空中的星星和其他天体。理解表观赤纬需要掌握天球坐标系统，这类似于地球上的纬度和经度，但应用于天球。天球是一个想象中的球体，围绕地球旋转，所有天体都投影到这个球体上。天球赤道是地球赤道投影到这个球体上的结果。当我们谈论表观赤纬时，我们实际上是在讨论一个天体相对于这个赤道平面的南北距离。例如，赤纬为+30度的星星位于天球赤道以北30度，而赤纬为-30度的星星则位于赤道以南30度。表观赤纬的重要性不仅限于简单的观察。它在天体测量学中发挥着重要作用，天体测量学是测量天体的位置和运动的科学。通过知道一颗星星的表观赤纬，天文学家可以计算出它在任意给定时间的天空位置。这项计算对于各种应用至关重要，包括卫星定位、导航，甚至理解我们银河系的动态。此外，表观赤纬并不是静态的；由于若干因素，它可能会发生变化，例如岁差和章动。岁差是指地球轴向的逐渐变化，影响着星星的坐标。章动是地球轴向的小幅周期性振荡，也会影响天体的表观位置。因此，天文学家必须在确定星星和其他天体的表观赤纬时考虑这些变化。对于业余天文学家来说，理解表观赤纬可以增强他们的观星体验。通过使用提供各种星星赤纬的星图或天文应用程序，他们可以更轻松地找到这些天体。了解表观赤纬有助于设置望远镜并准确对准，以便跟踪在天空中移动的天体。总之，表观赤纬是天文学中的一个基本概念，有助于观察和理解天体。无论是专业天文学家还是热心的业余爱好者，掌握表观赤纬的概念都会丰富探索宇宙的体验。随着我们继续深化对宇宙的认识，这些概念的重要性只会增加，使我们能够欣赏我们所居住的宇宙的美丽和复杂性。