trigonometric parallax

简明释义

三角视差

英英释义

例句

1.The concept of trigonometric parallax is essential for understanding stellar distances.

理解恒星距离时，三角视差的概念至关重要。

2.The trigonometric parallax method allows astronomers to determine distances with great accuracy.

使用三角视差方法，天文学家能够非常准确地确定距离。

3.In this study, we applied trigonometric parallax to measure the distances of several exoplanets.

在这项研究中，我们应用了三角视差来测量几个系外行星的距离。

4.By observing a star's position at different times, scientists can calculate its trigonometric parallax.

通过观察一颗恒星在不同时间的位置，科学家可以计算其三角视差。

5.Astronomers use trigonometric parallax to measure the distance of nearby stars from Earth.

天文学家使用三角视差来测量附近恒星与地球的距离。

作文

In the realm of astronomy, measuring distances to celestial objects is crucial for understanding the universe. One of the key methods employed by astronomers is the concept of trigonometric parallax (三角视差). This technique allows scientists to determine the distance to nearby stars by observing their apparent movement against the background of more distant stars as the Earth orbits the Sun. The basic principle behind trigonometric parallax involves geometry and trigonometry, where the angle of parallax is measured from two different positions in Earth's orbit, creating a triangle with the star at one vertex and the two observation points at the other two vertices.To elaborate further, when we observe a star from two different points in its orbit six months apart, we can see that the star appears to shift position relative to more distant stars. This shift is known as the parallax angle. By measuring this angle, astronomers can apply simple trigonometric functions to calculate the distance to the star. The smaller the parallax angle, the farther away the star is from Earth. Thus, trigonometric parallax serves as a fundamental tool in establishing the cosmic distance ladder, which is essential for measuring distances across the universe.The importance of trigonometric parallax cannot be overstated. It was one of the first methods used to measure stellar distances and laid the groundwork for modern astrophysics. For instance, the first successful measurement of trigonometric parallax was achieved in 1838 by Friedrich Bessel, who calculated the distance to the star 61 Cygni. This groundbreaking work demonstrated that stars were not fixed points of light but rather distant suns, leading to a paradigm shift in our understanding of the universe.Moreover, trigonometric parallax is particularly effective for measuring distances to stars within a few hundred light-years from Earth. However, as we look further into space, the parallax angles become exceedingly small, making it increasingly difficult to measure accurately. To address this limitation, astronomers have developed more advanced techniques, such as using space-based telescopes like the Hubble Space Telescope and the Gaia mission, which can measure these tiny angles with remarkable precision.In conclusion, the concept of trigonometric parallax (三角视差) is not just a mathematical abstraction; it is a vital observational tool that has significantly advanced our understanding of the cosmos. Through this method, we can gauge the distances to stars and further comprehend the structure and scale of the universe. As technology continues to evolve, the precision of trigonometric parallax measurements will only improve, allowing us to explore deeper into the universe and uncover more of its mysteries. The journey of understanding our place in the universe is ongoing, and trigonometric parallax remains a pivotal part of that exploration.

在天文学领域，测量天体的距离对于理解宇宙至关重要。天文学家使用的关键方法之一是三角视差（trigonometric parallax）的概念。这项技术允许科学家通过观察近距离恒星相对于更远恒星的表观运动来确定其距离，前提是地球绕太阳公转。三角视差背后的基本原理涉及几何和三角学，其中从地球轨道的两个不同位置测量视差角，形成一个以恒星为一个顶点、两个观察点为其他两个顶点的三角形。进一步阐述，当我们在相隔六个月的两个不同点观察一颗恒星时，可以看到这颗恒星相对于更远的恒星似乎发生了位置变化。这种变化被称为视差角。通过测量这个角度，天文学家可以应用简单的三角函数来计算恒星到地球的距离。视差角越小，恒星离地球就越远。因此，三角视差作为建立宇宙距离阶梯的基本工具，对于测量宇宙中的距离至关重要。三角视差的重要性不容小觑。它是测量恒星距离的第一种方法之一，为现代天体物理学奠定了基础。例如，弗里德里希·贝塞尔在1838年成功测量了三角视差，计算出了61 Cygni这颗恒星的距离。这项开创性的工作证明了恒星并不是固定的光点，而是遥远的太阳，从而引发了我们对宇宙理解的范式转变。此外，三角视差对于测量离地球几百光年内的恒星距离特别有效。然而，随着我们向太空更远处观察，视差角变得极其微小，使得准确测量变得越来越困难。为了应对这一局限性，天文学家开发了更先进的技术，例如使用哈勃太空望远镜和盖亚任务，这些技术可以以惊人的精度测量这些微小的角度。总之，三角视差（trigonometric parallax）的概念不仅仅是一个数学抽象；它是一种重要的观测工具，显著推动了我们对宇宙的理解。通过这种方法，我们可以衡量恒星的距离，并进一步理解宇宙的结构和规模。随着科技的不断进步，三角视差测量的精度只会提高，使我们能够更深入地探索宇宙，揭示更多的奥秘。理解我们在宇宙中的位置的旅程仍在继续，而三角视差仍然是这一探索过程中的关键部分。