ascending node

简明释义

升交点

英英释义

例句

1.The ascending node is crucial for understanding the tilt of the orbit.

理解轨道的倾斜度时，升交点是至关重要的。

2.The satellite crosses the equator at its ascending node.

卫星在其升交点处穿越赤道。

3.Astronomers track the ascending node of the asteroid's orbit to predict its future positions.

天文学家跟踪小行星轨道的升交点以预测其未来的位置。

4.The calculation of the ascending node helps in determining the orbital plane.

计算升交点有助于确定轨道平面。

5.During the lunar eclipse, the moon passes through its ascending node.

在月食期间，月亮经过其升交点。

作文

In the study of celestial mechanics, the term ascending node refers to a specific point in an orbit where an orbiting body, such as a planet or a satellite, crosses the plane of reference from south to north. This concept is crucial for understanding the dynamics of orbits, particularly when analyzing the motion of satellites around Earth or other celestial bodies. The ascending node plays a significant role in determining the orbital characteristics and behaviors of these objects. To illustrate the importance of the ascending node, consider the case of a satellite orbiting the Earth. As the satellite travels along its elliptical path, it will eventually reach a point where it intersects the equatorial plane. At this intersection, if the satellite moves from below the equator to above it, that specific point is defined as the ascending node. Conversely, if it were to move from above the equator to below, it would be termed the descending node. The position of the ascending node is not fixed; it changes over time due to gravitational influences from other celestial bodies. This shifting of the ascending node is known as nodal precession. Understanding this phenomenon is essential for mission planning in space exploration. For instance, when launching satellites, engineers must take into account the location of the ascending node to ensure that the satellite can achieve its intended orbit efficiently. Moreover, the ascending node is also significant in the context of eclipses. Eclipses occur when the Sun, Earth, and Moon align in a specific way. For a solar eclipse to happen, the Moon must be near its ascending node while being positioned between the Earth and the Sun. Similarly, for a lunar eclipse to occur, the Earth must be positioned between the Sun and the Moon, with the Moon close to its ascending node at the same time. Therefore, the ascending node directly influences the timing and frequency of eclipses, making it a vital point of study in astronomy. In conclusion, the ascending node is a fundamental concept in the field of celestial mechanics that helps us understand the behavior of orbits and the interactions between celestial bodies. Its significance extends beyond mere academic interest; it impacts satellite operations, space missions, and even the occurrence of natural phenomena like eclipses. As we continue to explore our universe, a deeper understanding of the ascending node will enhance our ability to navigate and utilize space more effectively. In summary, the ascending node (上升节点) is a pivotal aspect of orbital mechanics, influencing various astronomical events and practical applications in space exploration. By grasping its definition and implications, we can appreciate the complexities of celestial movements and their relevance to our technological advancements.

在天体力学研究中，术语ascending node（上升节点）指的是轨道中一个特定点，在这个点上，围绕某个天体（如行星或卫星）运行的物体从南向北穿过参考平面。这个概念对于理解轨道的动态非常重要，尤其是在分析卫星围绕地球或其他天体的运动时。ascending node（上升节点）在确定这些物体的轨道特征和行为方面发挥着重要作用。为了说明ascending node（上升节点）的重要性，考虑一个围绕地球运行的卫星。随着卫星沿其椭圆路径的移动，它最终会到达一个与赤道平面相交的点。在这个交点上，如果卫星从赤道以下移动到赤道以上，那么这个特定点就被定义为ascending node（上升节点）。相反，如果它从赤道以上移动到赤道以下，则称为下降节点。ascending node（上升节点）的位置并不是固定的；由于其他天体的引力影响，它会随着时间的推移而变化。这种ascending node（上升节点）的变化被称为节点进动。理解这一现象对于太空探索中的任务规划至关重要。例如，在发射卫星时，工程师必须考虑ascending node（上升节点）的位置，以确保卫星能够高效地达到预定轨道。此外，ascending node（上升节点）在日食和月食的背景下也很重要。日食发生在太阳、地球和月球以特定方式对齐时。为了发生日食，月球必须接近其ascending node（上升节点），同时位于地球和太阳之间。类似地，为了发生月食，地球必须位于太阳和月球之间，并且月球此时也必须接近其ascending node（上升节点）。因此，ascending node（上升节点）直接影响日食和月食的时机和频率，使其成为天文学研究的重要点。总之，ascending node（上升节点）是天体力学领域的一个基本概念，帮助我们理解轨道的行为以及天体之间的相互作用。它的重要性超越了单纯的学术兴趣；它影响着卫星操作、太空任务，甚至自然现象如日食的发生。随着我们继续探索宇宙，更深入地理解ascending node（上升节点）将增强我们有效导航和利用太空的能力。总之，ascending node（上升节点）是轨道力学中的一个关键方面，影响各种天文事件和太空探索中的实际应用。通过掌握其定义及其影响，我们可以欣赏天体运动的复杂性及其与技术进步的相关性。