perigee

简明释义

英[ˈperɪdʒiː]美[ˈperɪdʒiː]

n. 近地点

英英释义

单词用法

同义词

反义词

例句

1.The length of anomalistic month is related to the moon's phase at the perigee.

近点周长度与月亮过近地点时的月相有关；

2.The time between two passages at the perigee (of the Moon).

月球连续两次经过近地点所需的时间。

3.Rising on March 19, its exact full phase occurred within an hour of perigee, the closest point in the Moon's orbit to Earth.

3月19日那天的月亮，它最圆的相位发生在月球运行到近地点(月球轨道距离地球最近)附近一个小时以内的时间内。

4.If this is an ellipse around the Earth, this would be perigee and this would be apogee.

如果这是一个围绕地球的椭圆形，那么这是近地点，这是远地点。

5.Saturday night (Jan. 10) the moon will be at perigee, the closest point to us on this orbit.

星期六晚上（1月10日），月亮将会达到近地点，轨道上离我们最近的一点。

6.This phenomenon of extreme proximity, known as' maximal perigee, 'only occurs once every 18 years.

这种被称为“近地点”的月球最大程度接近地球的现象每十八年才发生一次。

7.We know the period, we know where apogee is, we know where perigee is, - we know the orbital period — anything we want to know.

知道周期，知道远地点，和近地点在哪里，知道轨道周期-，知道了想知道的一切。

8.The spacecraft was designed to enter orbit at its perigee to minimize fuel consumption.

这艘航天器被设计为在其近地点进入轨道，以最小化燃料消耗。

9.The next supermoon will occur when the moon is at its perigee.

下一个超级月亮将在月亮处于近地点时发生。

10.The satellite reached its perigee at 5:00 PM, allowing for optimal data collection.

卫星在下午5点达到了它的近地点，这使得数据收集达到最佳状态。

11.Astronomers often study the effects of gravity during a planet's perigee.

天文学家经常研究行星在其近地点时的引力效应。

12.During the perigee, the moon appears larger and brighter in the sky.

在近地点期间，月亮在天空中看起来更大更亮。

作文

In the realm of astronomy, understanding the various terms that describe celestial mechanics is crucial for both enthusiasts and professionals alike. One such term is perigee, which refers to the point in the orbit of an object where it is closest to the Earth. This term is often used when discussing the orbits of satellites, the Moon, and even artificial spacecraft. The significance of perigee lies not only in its definition but also in its implications for gravitational forces and orbital dynamics.When a satellite reaches its perigee, it experiences an increase in gravitational pull from the Earth. This can lead to several practical effects. For instance, satellites in low Earth orbit (LEO) may need to adjust their altitude and speed during this phase to maintain a stable orbit. Understanding the concept of perigee is essential for satellite operators who must calculate the optimal times for maneuvers to prevent collisions and ensure efficient operation.The Moon, Earth's natural satellite, also has a perigee. Its orbit around Earth is elliptical, meaning that the distance between the Moon and Earth varies throughout the month. When the Moon is at perigee, it appears larger and brighter in the night sky, a phenomenon often referred to as a 'supermoon.' This event captivates skywatchers and photographers alike, leading to increased interest in lunar observations. The occurrence of a supermoon can have cultural and scientific significance, inspiring art, folklore, and research into tidal patterns on Earth.Furthermore, the concept of perigee extends beyond just the Moon and artificial satellites. It plays a vital role in the study of comets and asteroids as well. When these celestial bodies approach Earth, their perigee can significantly influence their visibility and trajectory. Astronomers closely monitor these events to predict potential impacts or to plan observation missions. Knowing when an asteroid will reach its perigee allows scientists to gather valuable data about its composition and behavior.In addition to its scientific applications, perigee has also found its way into popular culture. Movies, books, and documentaries often reference the Moon's perigee when depicting space travel or celestial events. This term has become synonymous with wonder and exploration, capturing the imagination of many. As we continue to explore our universe, the understanding of terms like perigee enhances our appreciation of the complexities of space.In conclusion, the term perigee is more than just a scientific jargon; it represents a fascinating aspect of celestial mechanics that affects various fields from satellite operations to cultural phenomena. By grasping the significance of perigee, we can better understand the intricate dance of celestial bodies and appreciate the beauty of our universe. Whether you are an astronomer, a student, or simply a curious individual, the knowledge of perigee enriches your understanding of the cosmos and our place within it.

在天文学领域，理解描述天体力学的各种术语对爱好者和专业人士来说都是至关重要的。其中一个术语是perigee，它指的是物体轨道中离地球最近的点。这个术语通常用于讨论卫星、月球甚至人造航天器的轨道。perigee的重要性不仅在于它的定义，还在于它对引力和轨道动力学的影响。当卫星到达其perigee时，它会经历来自地球的引力增强。这可能导致几种实际效果。例如，低地球轨道（LEO）中的卫星可能需要在这一阶段调整其高度和速度，以维持稳定的轨道。理解perigee的概念对于卫星操作员来说至关重要，他们必须计算最佳的机动时间，以防止碰撞并确保高效操作。月球，地球的自然卫星，也有一个perigee。它围绕地球的轨道是椭圆形的，这意味着月球与地球之间的距离在整个周期内变化。当月球处于perigee时，它在夜空中看起来更大、更亮，这种现象通常被称为“超级月亮”。这一事件吸引了天文爱好者和摄影师的关注，导致对月球观测的兴趣增加。超级月亮的出现可以具有文化和科学意义，激发艺术、民间传说和对地球潮汐模式的研究。此外，perigee的概念不仅限于月球和人造卫星。它在彗星和小行星的研究中也起着至关重要的作用。当这些天体接近地球时，它们的perigee可能会显著影响它们的可见性和轨迹。天文学家密切监测这些事件，以预测潜在的撞击或计划观测任务。知道小行星何时会达到其perigee可以让科学家收集关于其成分和行为的宝贵数据。除了科学应用，perigee也进入了流行文化。电影、书籍和纪录片常常提到月球的perigee，描绘太空旅行或天体事件。这个术语已经成为奇迹和探索的同义词，捕捉了许多人的想象力。随着我们继续探索宇宙，对像perigee这样的术语的理解增强了我们对空间复杂性的欣赏。总之，perigee这个术语不仅仅是科学术语；它代表了天体力学的一个迷人方面，影响着从卫星操作到文化现象的各个领域。通过掌握perigee的重要性，我们可以更好地理解天体的复杂舞蹈，并欣赏我们宇宙的美。无论你是天文学家、学生还是仅仅是一个好奇的人，了解perigee的知识都能丰富你对宇宙及我们在其中位置的理解。