mean parallax

简明释义

平均视差

英英释义

例句

1.Using the mean parallax 平均视差, scientists can estimate how far away galaxies are from us.

利用mean parallax 平均视差，科学家可以估算出银河系离我们有多远。

2.The astronomer calculated the mean parallax 平均视差 of the nearby star to determine its distance from Earth.

天文学家计算了附近恒星的mean parallax 平均视差以确定其与地球的距离。

3.The mean parallax 平均视差 method helps astronomers measure distances without relying on bright stars.

使用mean parallax 平均视差方法，天文学家可以在不依赖亮星的情况下测量距离。

4.To get an accurate reading, the researchers needed to account for the mean parallax 平均视差 of the observed objects.

为了获得准确的读数，研究人员需要考虑所观测物体的mean parallax 平均视差。

5.The mean parallax 平均视差 is crucial for calibrating distance measurements in astronomy.

在天文学中，mean parallax 平均视差 对于校准距离测量至关重要。

作文

In the realm of astronomy, understanding the distances between celestial bodies is crucial for mapping our universe. One of the fundamental concepts that help astronomers measure these vast distances is the concept of parallax. Specifically, the term mean parallax refers to the average angular displacement observed when an object is viewed from two different positions. This concept is essential in determining the distance to stars and other celestial objects. To grasp the significance of mean parallax, it is important to first understand how parallax works. When we observe a nearby object from two different vantage points, the object appears to shift against a distant background. This shift is known as parallax, and its measurement can provide valuable information about the object's distance from the observer.For example, consider a person standing on one side of a street looking at a tree on the other side. If they move to the opposite side of the street, they will notice that the tree appears to have shifted position relative to the background buildings. The angle of this shift can be measured, and using trigonometry, the distance to the tree can be calculated. In astronomy, this principle is applied on a much grander scale. By observing a star from two different points in Earth's orbit around the Sun, astronomers can measure its mean parallax. The smaller the angle of parallax, the farther away the star is.The mean parallax is particularly useful because it averages out any discrepancies that may arise from observational errors or atmospheric disturbances. By taking multiple measurements over time, astronomers can arrive at a more accurate representation of a star's distance. This is crucial for constructing a reliable cosmic distance ladder, which allows scientists to measure distances to far-off galaxies and other astronomical phenomena.Moreover, the mean parallax has implications beyond just measuring distances. It also plays a role in understanding the structure and evolution of the universe. For instance, knowing the distances to various stars helps astronomers determine their luminosity and, consequently, their size and age. This information is vital for studying stellar evolution and the lifecycle of stars.In conclusion, the concept of mean parallax is a fundamental aspect of astronomical measurements. It provides a method for determining the distances to stars based on their observed angular shifts from different vantage points. By utilizing the mean parallax, astronomers can not only measure the distances to nearby stars but also gain insights into the broader structure of the universe. As technology advances and telescopes become more sophisticated, our ability to measure mean parallax with greater precision will undoubtedly lead to new discoveries and a deeper understanding of the cosmos.

在天文学领域，理解天体之间的距离对于绘制我们的宇宙至关重要。帮助天文学家测量这些浩瀚距离的基本概念之一是视差的概念。具体来说，术语平均视差指的是从两个不同位置观察时物体的平均角位移。这个概念对于确定星星和其他天体的距离至关重要。要理解平均视差的重要性，首先需要了解视差是如何工作的。当我们从两个不同的视点观察一个附近的物体时，这个物体似乎在远处背景中移动。这种移动被称为视差，其测量可以提供有关物体与观察者之间距离的宝贵信息。例如，考虑一个人站在街道一侧看对面的一棵树。如果他们移动到街道的另一侧，他们会注意到树相对于背景建筑物的位置似乎发生了变化。这个移动的角度可以被测量，并利用三角学计算出树的距离。在天文学中，这一原理在更大的尺度上得到了应用。通过从地球绕太阳的两个不同位置观察一颗星星，天文学家可以测量其平均视差。视差的角度越小，星星就越远。平均视差特别有用，因为它可以平均掉由于观测误差或大气扰动而产生的任何差异。通过随着时间推移进行多次测量，天文学家可以得出更准确的星星距离表示。这对于构建可靠的宇宙距离梯子至关重要，该梯子允许科学家测量遥远星系和其他天文现象的距离。此外，平均视差不仅在测量距离方面具有重要意义，还在理解宇宙的结构和演化方面发挥着作用。例如，了解各种星星的距离有助于天文学家确定它们的光度，从而推断出它们的大小和年龄。这些信息对于研究恒星演化和恒星生命周期至关重要。总之，平均视差的概念是天文测量的基本方面。它提供了一种基于从不同视点观察时的角度变化来确定星星距离的方法。通过利用平均视差，天文学家不仅可以测量近距离星星的距离，还可以深入了解宇宙的更广泛结构。随着技术的进步和望远镜变得更加先进，我们对平均视差的精确测量能力无疑会导致新的发现和对宇宙更深刻的理解。