absolute parallax

简明释义

绝对视差;

英英释义

例句

1.Using the absolute parallax 绝对视差 method, researchers were able to more accurately measure the distance to the galaxy.

研究人员使用绝对视差 absolute parallax 方法更准确地测量了到该星系的距离。

2.Understanding absolute parallax 绝对视差 is crucial for astrophysics and studying stellar distances.

理解绝对视差 absolute parallax 对于天体物理学和研究恒星距离至关重要。

3.The absolute parallax 绝对视差 of the planet was measured using advanced telescopes in space.

利用太空中的先进望远镜测量了该行星的绝对视差 absolute parallax。

4.The astronomer calculated the absolute parallax 绝对视差 of the nearby star to determine its distance from Earth.

天文学家计算了附近恒星的绝对视差 absolute parallax以确定其与地球的距离。

5.The team published their findings on the absolute parallax 绝对视差 of various celestial bodies.

该团队发表了关于各种天体的绝对视差 absolute parallax 的研究结果。

作文

Understanding the concept of absolute parallax is crucial for anyone interested in astronomy and the measurement of distances in space. In simple terms, absolute parallax refers to the apparent shift in position of a star or celestial body when viewed from different points in Earth’s orbit around the Sun. This phenomenon occurs due to the finite distance of stars from our planet, providing astronomers with a method to calculate their distances accurately. To grasp the significance of absolute parallax, one must first understand the basic principles of parallax itself. Parallax is the effect whereby the position or direction of an object appears to differ when viewed from different angles. This effect is not limited to astronomy; it can be observed in everyday life. For instance, when you hold your finger up in front of your face and close one eye, then switch eyes, your finger appears to move against the background. This is a simple demonstration of parallax.In astronomy, absolute parallax is measured in arcseconds. The formula used to calculate the distance to a star based on its parallax angle is straightforward: distance (in parsecs) is equal to 1 divided by the parallax angle (in arcseconds). For example, if a star has a parallax of 0.1 arcseconds, its distance from Earth is 10 parsecs. This method allows astronomers to determine the distances to nearby stars with remarkable accuracy.The importance of absolute parallax cannot be overstated. It serves as a fundamental tool in the field of astrometry, which is the branch of astronomy that deals with the positions and movements of celestial bodies. By measuring the distances to stars, astronomers can better understand the structure of our galaxy and the universe as a whole. Additionally, this information is essential for calibrating other distance measurement methods, such as standard candles and redshift measurements.Despite its significance, there are limitations to the measurement of absolute parallax. The further away a star is, the smaller its parallax angle becomes, making it increasingly difficult to measure accurately. Stars beyond a certain distance become nearly impossible to observe using this method, which is why astronomers often rely on other techniques for distant objects.In conclusion, absolute parallax is a vital concept in astronomy that allows scientists to measure the distances to nearby stars. Understanding this concept helps us appreciate the vastness of the universe and our place within it. As technology advances, new methods and instruments continue to improve our ability to measure these distances, leading to exciting discoveries about the cosmos. The study of absolute parallax is not just a technical exercise; it is a gateway to understanding the universe's structure and the fundamental laws that govern it. By mastering this concept, we can unlock the mysteries of the stars and deepen our knowledge of the universe.

理解绝对视差的概念对于任何对天文学和空间距离测量感兴趣的人来说都是至关重要的。简单来说，绝对视差指的是当从地球围绕太阳的不同位置观察一颗星星或天体时，其位置的表观变化。这一现象由于星星与我们星球之间的有限距离而发生，为天文学家提供了一种准确计算其距离的方法。要掌握绝对视差的重要性，首先必须理解视差本身的基本原理。视差是指当从不同角度观察物体时，物体的位置或方向似乎有所不同的效果。这一效应不仅限于天文学；在日常生活中也可以观察到。例如，当你在面前举起手指并闭上一只眼睛，然后换眼睛时，你的手指似乎在背景中移动。这是视差的一个简单演示。在天文学中，绝对视差以弧秒为单位进行测量。根据视差角度计算星星距离的公式非常简单：距离（以秒差距为单位）等于1除以视差角（以弧秒为单位）。例如，如果一颗星星的视差为0.1弧秒，则它与地球的距离为10秒差距。这种方法使天文学家能够以惊人的准确性确定附近星星的距离。绝对视差的重要性不容小觑。它作为天文学中的一个基本工具，服务于天文学的一个分支，即天体测量学，该领域涉及天体的位置和运动。通过测量星星的距离，天文学家可以更好地理解我们银河系及整个宇宙的结构。此外，这些信息对于校准其他距离测量方法（例如标准烛光法和红移测量）至关重要。尽管绝对视差的重要性显而易见，但其测量也存在局限性。随着星星距离的增加，其视差角度变得越来越小，使得准确测量变得越来越困难。超出某个距离的星星几乎无法使用这种方法观察，这就是为什么天文学家通常依赖其他技术来处理遥远天体。总之，绝对视差是天文学中的一个重要概念，它使科学家能够测量附近星星的距离。理解这一概念帮助我们欣赏宇宙的广阔以及我们在其中的位置。随着科技的进步，新方法和仪器不断提高我们测量这些距离的能力，从而带来关于宇宙的激动人心的发现。研究绝对视差不仅仅是一个技术练习；它是理解宇宙结构和支配其基本法则的一个门户。通过掌握这一概念，我们可以解锁星星的奥秘，深化我们对宇宙的认识。