apoapsis

简明释义

英[ˌæpəˈæpsɪs]美[ˌæpəˈæpsɪs]

n. 最远点；[天] 远重心点

复 数 a p o a p s e s 或 a p o a p s i d e s

英英释义

单词用法

同义词

反义词

例句

1.The repeated thrust applications at apoapsis would raise periapsis from inside to outside the stationary orbit.

重复在远心点施以推力，会将近心点由同步轨道内提升到同步轨道外。

2.The repeated thrust applications at apoapsis would raise periapsis from inside to outside the stationary orbit.

重复在远心点施以推力，会将近心点由同步轨道内提升到同步轨道外。

3.Apoapsis in earth orbit; the point in its orbit where a satellite is at the greatest distance from the earth.

以地球为中心的最远点；人造卫星轨道上离地球中心最远的点。

4.The spacecraft reached its highest point at the apoapsis (远地点) before starting its descent.

宇宙飞船在开始下降之前达到了它的最高点，即apoapsis (远地点)。

5.When calculating the orbit, we must consider the apoapsis (远地点) to ensure accuracy.

在计算轨道时，我们必须考虑apoapsis (远地点)以确保准确性。

6.The satellite's apoapsis (远地点) is crucial for optimizing its communication capabilities.

卫星的apoapsis (远地点)对于优化其通信能力至关重要。

7.During the mission, the team monitored the apoapsis (远地点) to plan the next maneuver.

在任务期间，团队监测了apoapsis (远地点)以计划下一步操作。

8.The apoapsis (远地点) of the moon's orbit affects tidal patterns on Earth.

月球轨道的apoapsis (远地点)影响地球上的潮汐模式。

作文

In the realm of celestial mechanics, understanding the various terms that describe orbital dynamics is crucial for both amateur astronomers and seasoned astrophysicists alike. One such term is apoapsis, which refers to the point in an orbit that is farthest from the body being orbited. This concept is essential when discussing the orbits of planets, moons, and artificial satellites. When a satellite is launched into space, its trajectory is carefully calculated to ensure that it reaches the desired altitude and speed. The apoapsis of a satellite's orbit plays a significant role in determining its operational capabilities and longevity. For instance, the higher the apoapsis, the longer the satellite can avoid atmospheric drag, which can lead to premature decay of its orbit. To illustrate this, consider a satellite in a geostationary orbit. It maintains a position relative to the Earth, allowing it to provide consistent communication services. The apoapsis of such an orbit is approximately 35,786 kilometers above the Earth's equator. At this distance, the gravitational pull of the Earth is balanced by the satellite's orbital velocity, allowing it to remain stationary over a fixed point on the ground. This unique aspect of its orbit is what makes the apoapsis so vital for communication satellites. Moreover, the concept of apoapsis is not limited to artificial satellites. It also applies to natural celestial bodies, such as the Moon and other planets. For example, when we observe the Moon’s orbit around the Earth, we can identify its apoapsis, known as apogee. At apogee, the Moon is at its farthest point from Earth, which occurs approximately every 27.3 days. Understanding the apoapsis of the Moon's orbit helps scientists predict lunar phenomena, such as eclipses and supermoons, where the Moon appears larger and brighter due to its proximity to Earth. In addition to its practical applications, the study of apoapsis also connects to broader themes in astronomy and physics. It highlights the interplay between gravitational forces and orbital mechanics, illustrating how celestial bodies interact with one another. This understanding can lead to advancements in space exploration, as missions are designed with precise calculations of apoapsis and perigee, the closest point in the orbit. In conclusion, the term apoapsis encapsulates a fundamental aspect of orbital dynamics, serving as a critical factor in both natural and artificial celestial mechanics. Whether it is facilitating the operation of satellites or enhancing our understanding of the Moon's orbit, grasping the significance of apoapsis enriches our knowledge of the universe. As we continue to explore the cosmos, the importance of such terms will only grow, guiding future generations in their quest for discovery and understanding of the celestial wonders that surround us.

在天体力学的领域中，理解描述轨道动力学的各种术语对业余天文学家和经验丰富的天体物理学家而言都是至关重要的。其中一个术语是apoapsis，它指的是在轨道上离被围绕的天体最远的点。这个概念在讨论行星、卫星和人造卫星的轨道时非常重要。当一颗卫星被发射到太空时，其轨迹经过仔细计算，以确保其达到所需的高度和速度。卫星轨道的apoapsis在决定其操作能力和寿命方面起着重要作用。例如，apoapsis越高，卫星就越能避免大气阻力，这可能导致其轨道的过早衰减。 为了说明这一点，考虑一下处于静止轨道的卫星。它保持相对于地球的位置，使其能够提供稳定的通信服务。此类轨道的apoapsis大约是在地球赤道上方35,786公里。在这个距离上，地球的引力与卫星的轨道速度之间形成平衡，使其能够在地面上固定点上保持静止。其轨道的这一独特特性使得apoapsis对通信卫星至关重要。 此外，apoapsis的概念不仅限于人造卫星。它也适用于自然天体，例如月球和其他行星。例如，当我们观察月球围绕地球的轨道时，我们可以识别出它的apoapsis，称为远地点。在远地点，月球处于离地球最远的点，这大约每27.3天发生一次。理解月球轨道的apoapsis有助于科学家预测月相现象，如日食和超级月亮，在这些现象中，月球由于靠近地球而显得更大更亮。 除了实际应用外，研究apoapsis还与天文学和物理学中的更广泛主题相关联。它突显了引力和轨道力学之间的相互作用，说明了天体之间如何相互作用。这种理解可以推动太空探索的进步，因为任务设计需要精确计算apoapsis和近地点，即轨道中最近的点。 总之，术语apoapsis概括了轨道动力学的基本方面，是自然和人造天体力学的关键因素。无论是促进卫星的运行，还是增强我们对月球轨道的理解，掌握apoapsis的重要性都丰富了我们对宇宙的知识。随着我们继续探索宇宙，这些术语的重要性只会增加，引导未来几代人在发现和理解环绕我们的天体奇观的追求中。