space velocity

简明释义

空间速度

英英释义

例句

1.Engineers must calculate the space velocity (空间速度) of the spacecraft to ensure it reaches its destination on time.

工程师必须计算航天器的空间速度以确保它按时到达目的地。

2.The rocket achieved a high space velocity (空间速度) necessary to escape Earth's gravity.

火箭达到了逃离地球引力所需的高空间速度。

3.In astrophysics, the space velocity (空间速度) of stars is crucial for understanding their movement in the galaxy.

在天体物理学中，恒星的空间速度对于理解它们在银河系中的运动至关重要。

4.To maintain orbit, satellites need to achieve a specific space velocity (空间速度).

为了维持轨道，卫星需要达到特定的空间速度。

5.The space velocity (空间速度) of comets can vary significantly as they approach the sun.

彗星的空间速度在接近太阳时可能会有显著变化。

作文

In the realm of astrophysics and space exploration, the term space velocity refers to the speed at which an object must travel to escape the gravitational influence of a celestial body. This concept is crucial for understanding how spacecraft leave Earth’s atmosphere and enter orbit or travel to other planets. The space velocity required for a spacecraft depends on various factors including the mass of the celestial body and the altitude from which the launch occurs.To illustrate this, let us consider the Earth. The space velocity necessary to escape Earth's gravitational pull is approximately 11.2 kilometers per second, or about 25,000 miles per hour. This high speed is essential because it allows the spacecraft to break free from the gravitational forces that keep it tethered to the planet. Without reaching this critical velocity, any attempt to launch into space would result in the spacecraft falling back to Earth.The concept of space velocity extends beyond just escaping gravity; it also plays a significant role in orbital mechanics. Once a spacecraft achieves the requisite space velocity, it can enter a stable orbit around the Earth or another celestial body. This is achieved by balancing the gravitational pull of the planet with the inertia of the spacecraft, allowing it to travel in a curved path rather than falling back to the surface.Moreover, space velocity is not a static figure; it varies depending on the mission profile. For example, missions aimed at reaching Mars require different velocities compared to those intended for the Moon. The space velocity needed to reach Mars is influenced by its distance from Earth and the alignment of the two planets during the launch window. Engineers and scientists meticulously calculate these velocities to ensure successful missions.In addition to its scientific significance, understanding space velocity is essential for technological advancements. The development of rockets and propulsion systems relies heavily on the principles of space velocity. Engineers must design engines capable of producing sufficient thrust to achieve the necessary speeds. This involves intricate calculations and simulations to ensure that the spacecraft can withstand the immense forces experienced during launch and travel through space.Furthermore, the implications of space velocity extend to future space exploration endeavors. As humanity looks towards Mars, asteroids, and beyond, mastering the intricacies of space velocity will be vital. New technologies, such as ion propulsion and nuclear thermal engines, are being explored to enhance our capabilities in achieving higher velocities more efficiently.In conclusion, the term space velocity encapsulates a fundamental aspect of space travel, representing the speed necessary to overcome gravitational barriers and achieve orbital stability. As we continue to explore the cosmos, a deeper understanding of space velocity will remain pivotal in shaping the future of space exploration and technology. It is not merely a number but a gateway to the universe, enabling us to venture beyond our home planet and discover the wonders that lie beyond.

在天体物理学和太空探索领域，术语space velocity指的是一个物体必须以多快的速度才能逃离天体的引力影响。这个概念对于理解宇宙飞船如何离开地球大气层并进入轨道或前往其他行星至关重要。所需的space velocity取决于多个因素，包括天体的质量和发射高度。为了说明这一点，让我们考虑地球。逃离地球引力所需的space velocity大约为每秒11.2公里，或每小时约25,000英里。这种高速是必不可少的，因为它允许宇宙飞船摆脱将其固定在地球上的引力。如果没有达到这个关键速度，任何尝试发射进入太空的努力都将导致宇宙飞船重新坠回地球。space velocity的概念不仅仅局限于逃离引力；它在轨道力学中也起着重要作用。一旦宇宙飞船达到了所需的space velocity，它就可以进入围绕地球或其他天体的稳定轨道。这是通过平衡行星的引力与宇宙飞船的惯性来实现的，使其沿着弯曲的路径旅行，而不是掉回地面。此外，space velocity并不是一个静态的数字；它会根据任务轮廓而变化。例如，旨在到达火星的任务所需的速度与那些打算前往月球的任务不同。到达火星所需的space velocity受到地球与火星之间距离及两者在发射窗口期间对齐的影响。工程师和科学家们精确计算这些速度，以确保任务的成功。除了科学意义，理解space velocity对于技术进步也至关重要。火箭和推进系统的发展在很大程度上依赖于space velocity的原理。工程师们必须设计能够产生足够推力以达到所需速度的发动机。这涉及复杂的计算和模拟，以确保宇宙飞船能够承受发射和穿越太空时经历的巨大力量。此外，space velocity的影响扩展到未来的太空探索事业。随着人类向火星、小行星及更远处探索，掌握space velocity的复杂性将是至关重要的。正在探索的新技术，如离子推进和核热发动机，将增强我们以更高效的方式实现更高速度的能力。总之，术语space velocity概括了太空旅行的一个基本方面，代表了克服引力障碍和实现轨道稳定所需的速度。随着我们继续探索宇宙，对space velocity的更深入理解将始终是塑造太空探索和技术未来的关键。它不仅仅是一个数字，而是通往宇宙的门户，使我们能够超越家园星球，发现隐藏在其后的奇迹。