time of perihelion passage

简明释义

近日点时间

英英释义

例句

1.The astronomers calculated the time of perihelion passage to predict the comet's visibility in the night sky.

天文学家计算了近日点经过时间以预测彗星在夜空中的可见性。

2.By observing the time of perihelion passage, researchers can gather data on the orbit of the planet.

通过观察近日点经过时间，研究人员可以收集有关行星轨道的数据。

3.The time of perihelion passage for Earth occurs every year in early January.

地球的近日点经过时间每年在一月初发生。

4.Understanding the time of perihelion passage helps scientists study the gravitational effects on celestial bodies.

理解近日点经过时间有助于科学家研究天体的引力影响。

5.The satellite's mission was adjusted based on the predicted time of perihelion passage of the nearby planet.

卫星任务根据附近行星的预测近日点经过时间进行了调整。

作文

The study of celestial bodies has always fascinated humanity, and one of the most intriguing aspects of this field is understanding the orbits of planets and other objects in space. A critical concept in this context is the time of perihelion passage, which refers to the moment when a celestial body, such as a planet or comet, reaches its closest point to the Sun in its elliptical orbit. This event is not only significant for astronomers but also plays a crucial role in our understanding of the dynamics of the solar system.To comprehend the importance of the time of perihelion passage, we must first look at the nature of orbits. Most celestial bodies do not travel in perfect circles; instead, they follow elliptical paths defined by Kepler's laws of planetary motion. These laws describe how planets move around the Sun, with each planet having a unique orbital period and eccentricity. The perihelion is the point in this orbit where the object is closest to the Sun, and the time of perihelion passage marks the specific moment this occurs.For example, Earth’s perihelion occurs around January 3rd each year, when it is approximately 147 million kilometers from the Sun. This proximity influences various phenomena on Earth, including seasonal variations and climate patterns. Understanding when Earth reaches this point helps scientists predict weather changes and study climate trends over time.Moreover, the time of perihelion passage is vital for missions involving spacecraft. When planning missions to other planets, engineers and scientists must take into account the positions of these planets relative to the Sun. Knowing when a spacecraft will reach its perihelion can optimize fuel usage and enhance the efficiency of the mission. For instance, during the flyby of a spacecraft near a planet, the timing of the time of perihelion passage can be crucial for capturing high-quality images and data.In addition to practical applications, the time of perihelion passage has profound implications for our understanding of gravitational interactions within the solar system. As celestial bodies exert gravitational forces on one another, their orbits can change over time due to perturbations. By studying the time of perihelion passage of various objects, astronomers can gain insights into these interactions and predict future positions of these bodies with greater accuracy.Furthermore, the concept of perihelion is not limited to our solar system. Other star systems exhibit similar phenomena, and the time of perihelion passage can provide valuable information about the characteristics of exoplanets and their potential habitability. By analyzing the orbits of these distant worlds, scientists can infer their climates and environments, helping us understand the possibilities of life beyond our planet.In conclusion, the time of perihelion passage is a fundamental concept in astronomy that encompasses various aspects of celestial mechanics, climate science, and space exploration. Its significance extends from predicting weather patterns on Earth to planning interplanetary missions and studying the dynamics of distant star systems. As our knowledge of the universe expands, the understanding of such concepts will continue to play a pivotal role in unlocking the mysteries of the cosmos and our place within it.

天体研究一直吸引着人类，而这一领域中最引人入胜的方面之一就是理解行星和其他天体在太空中的轨道。在这个背景下，一个关键概念是近日点经过时间，它指的是一个天体（如行星或彗星）在其椭圆轨道上达到离太阳最近点的时刻。这个事件不仅对天文学家至关重要，而且在我们理解太阳系的动态方面也发挥着重要作用。要理解近日点经过时间的重要性，我们必须首先了解轨道的性质。大多数天体并不是沿着完美的圆形轨道运动；相反，它们遵循由开普勒行星运动定律定义的椭圆路径。这些定律描述了行星如何围绕太阳运动，每颗行星都有独特的轨道周期和离心率。近日点是这个轨道中天体离太阳最近的点，而近日点经过时间则标志着这一时刻的特定时刻。例如，地球的近日点大约发生在每年的1月3日，此时地球距离太阳约1.47亿公里。这种接近度影响着地球上的各种现象，包括季节变化和气候模式。了解地球何时达到这一点有助于科学家预测天气变化，并研究气候趋势。此外，近日点经过时间对涉及航天器的任务至关重要。在规划前往其他行星的任务时，工程师和科学家必须考虑这些行星相对于太阳的位置。知道航天器何时达到其近日点可以优化燃料使用，提高任务效率。例如，在航天器靠近某个行星时进行飞越时，近日点经过时间的时机对捕捉高质量图像和数据至关重要。除了实际应用外，近日点经过时间对我们理解太阳系内的引力相互作用具有深远的影响。随着天体之间施加引力，它们的轨道可能会随着时间的推移而变化。通过研究各种天体的近日点经过时间，天文学家可以深入了解这些相互作用，并更准确地预测这些天体的未来位置。此外，近日点的概念并不限于我们的太阳系。其他恒星系统也表现出类似现象，而近日点经过时间可以提供有关系外行星及其潜在可居住性的宝贵信息。通过分析这些遥远世界的轨道，科学家可以推断出它们的气候和环境，从而帮助我们理解地球之外生命的可能性。总之，近日点经过时间是天文学中的一个基本概念，涵盖了天体力学、气候科学和太空探索的各个方面。它的重要性从预测地球的天气模式到规划行星际任务，再到研究遥远恒星系统的动态。随着我们对宇宙的知识不断扩展，这样的概念的理解将继续在揭示宇宙的奥秘和我们在其中的位置方面发挥关键作用。