elements of orbit

简明释义

轨道要素

英英释义

例句

1.Understanding the elements of orbit 轨道元素 helps in planning interplanetary missions.

理解轨道元素 轨道元素有助于规划行星际任务。

2.The NASA team reviewed the elements of orbit 轨道元素 before launching the satellite.

NASA团队在发射卫星之前审查了轨道元素 轨道元素。

3.The elements of orbit 轨道元素 are crucial for predicting a spacecraft's position.

对于预测航天器的位置，轨道元素 轨道元素至关重要。

4.The satellite's elements of orbit 轨道元素 include its inclination and eccentricity.

卫星的轨道元素 轨道元素包括其倾角和偏心率。

5.Engineers need to calculate the elements of orbit 轨道元素 to ensure the satellite stays in the correct path.

工程师需要计算轨道元素 轨道元素以确保卫星保持在正确的轨道上。

作文

The study of celestial bodies and their movements has fascinated humans for centuries. One of the fundamental concepts in this field is the elements of orbit, which refers to the parameters that define the shape, orientation, and position of an orbiting object in space. Understanding these elements is crucial for astronomers and space scientists as they work to predict the paths of planets, moons, and artificial satellites. There are six primary elements of orbit that are essential for characterizing an orbit: semi-major axis, eccentricity, inclination, argument of periapsis, longitude of ascending node, and true anomaly. Each of these elements plays a significant role in determining the trajectory of an object as it moves around a central body, such as a star or planet.The semi-major axis is the longest diameter of an elliptical orbit and represents the average distance between the orbiting body and the central body. It is a vital parameter because it directly influences the orbital period, which is the time it takes for the object to complete one full orbit. The larger the semi-major axis, the longer the orbital period. This relationship is described by Kepler's Third Law of Planetary Motion, which states that the square of the orbital period is proportional to the cube of the semi-major axis.Eccentricity measures the deviation of an orbit from being circular. An eccentricity of zero indicates a perfect circle, while values closer to one represent more elongated ellipses. Understanding eccentricity is important for predicting how close an orbiting body will come to the central body during its orbit. For example, comets often have high eccentricities, resulting in highly elongated orbits that bring them close to the Sun at certain points in their journey.Inclination describes the tilt of an orbit relative to a reference plane, usually the equatorial plane of the central body. A low inclination means that the orbit is nearly in the same plane as the equator, while a high inclination indicates a more polar orbit. This parameter is particularly significant for satellites, as it determines their coverage area on the surface of the Earth and affects communication and observation capabilities.The argument of periapsis specifies the orientation of the ellipse within the orbital plane, indicating where the closest approach to the central body occurs. Meanwhile, the longitude of ascending node defines the point where the orbit crosses the reference plane from south to north. These two elements help to precisely locate the orbit in three-dimensional space.Finally, true anomaly is the angle between the direction of periapsis and the current position of the orbiting body, measured at the central body. This element is crucial for determining the position of the object at any given time during its orbit.In conclusion, the elements of orbit are fundamental to our understanding of celestial mechanics. They provide the necessary framework for predicting the motion of objects in space, whether they are natural celestial bodies like planets and moons or human-made satellites. Mastery of these elements allows scientists to navigate the complexities of the universe, enabling advancements in space exploration and our comprehension of the cosmos. By studying the elements of orbit, we gain insights into the intricate dance of celestial bodies and the forces that govern their movements, ultimately deepening our appreciation for the universe we inhabit.

对天体及其运动的研究几个世纪以来一直吸引着人类。在这一领域的基本概念之一是轨道元素，它指的是定义在太空中绕行物体的轨道形状、方向和位置的参数。理解这些元素对于天文学家和空间科学家至关重要，因为他们努力预测行星、卫星和人造卫星的路径。有六个主要的轨道元素对于特征化轨道至关重要：半长轴、偏心率、倾角、近日点的参数、升交点的经度和真异常。这些元素中的每一个都在确定物体围绕中央天体（如恒星或行星）运动的轨迹中发挥着重要作用。半长轴是椭圆轨道的最长直径，代表了绕行物体与中央天体之间的平均距离。它是一个重要的参数，因为它直接影响轨道周期，即物体完成一次完整轨道所需的时间。半长轴越大，轨道周期越长。这种关系由开普勒的第三定律描述，该定律指出，轨道周期的平方与半长轴的立方成正比。偏心率衡量轨道从圆形的偏离程度。偏心率为零表示完美的圆形，而接近于一的值表示更拉长的椭圆。理解偏心率对于预测绕行物体在其轨道上与中央天体的距离至关重要。例如，彗星通常具有较高的偏心率，导致它们的轨道高度拉长，在某些时刻接近太阳。倾角描述了相对于参考平面（通常是中央天体的赤道平面）的轨道倾斜度。低倾角意味着轨道几乎与赤道平面相同，而高倾角则表示更极地的轨道。这个参数对于卫星尤为重要，因为它决定了它们在地球表面的覆盖区域，并影响通信和观测能力。近日点的参数指定了椭圆在轨道平面内的方向，指示与中央天体的最近接触发生的位置。同时，升交点的经度定义了轨道从南向北穿过参考平面的点。这两个元素有助于精确定位三维空间中的轨道。最后，真异常是指在中央天体处测量的近日点方向与绕行物体当前位置之间的角度。这个元素对于确定物体在其轨道上的任意时刻的位置至关重要。总之，轨道元素是我们理解天体力学的基础。它们提供了预测太空中物体运动所需的框架，无论它们是自然天体，如行星和卫星，还是人造卫星。掌握这些元素使科学家能够驾驭宇宙的复杂性，从而推动太空探索的进步和我们对宇宙的理解。通过研究轨道元素，我们获得了对天体之间复杂舞蹈及其运动规律的深入见解，最终加深了我们对所居住宇宙的欣赏。