gravitational selection

简明释义

重力分选;

英英释义

例句

1.The effects of gravitational selection (引力选择) can be observed in the way certain plants grow taller in low-gravity environments.

在低重力环境中，某些植物长得更高的方式可以观察到引力选择 (gravitational selection) 的影响。

2.Understanding gravitational selection (引力选择) is crucial for developing habitats for astronauts on Mars.

理解引力选择 (gravitational selection) 对于为宇航员在火星上开发栖息地至关重要。

3.In the study of evolutionary biology, researchers often discuss the concept of gravitational selection (引力选择) to explain how certain traits are favored in specific environments.

在进化生物学研究中，研究人员经常讨论引力选择 (gravitational selection) 的概念，以解释某些特征如何在特定环境中受到青睐。

4.Some biologists argue that gravitational selection (引力选择) could influence the evolution of life forms in microgravity.

一些生物学家认为，引力选择 (gravitational selection) 可能会影响微重力环境中生命形式的进化。

5.Scientists proposed that gravitational selection (引力选择) plays a role in the survival of species on different planets.

科学家提出，引力选择 (gravitational selection) 在不同星球上物种的生存中发挥作用。

作文

In the vast cosmos, the forces that govern celestial bodies are intricate and fascinating. One concept that has emerged in scientific discussions is gravitational selection, which refers to the process by which gravity influences the distribution and survival of various celestial objects based on their mass and distance from larger bodies. This phenomenon can be observed in numerous contexts, from the formation of planetary systems to the dynamics of galaxies. Understanding gravitational selection is crucial for comprehending how the universe evolves over time.To illustrate this concept, consider the formation of a solar system. During the early stages of a star's life, a cloud of gas and dust begins to collapse under its own gravity. As this collapse occurs, particles within the cloud clump together, forming larger bodies. Here, gravitational selection plays a pivotal role; the more massive objects exert a stronger gravitational pull, attracting smaller particles and leading to the formation of planets. Consequently, planets that are closer to the star tend to be rocky and smaller, while those further away are often gas giants. This distribution is a direct result of gravitational selection, as the gravitational forces dictate which materials can coalesce and survive in each region of the protoplanetary disk.Moreover, gravitational selection also affects the stability of orbits within a solar system. For instance, a large planet like Jupiter possesses significant mass and exerts a strong gravitational force. This influence can either stabilize or destabilize the orbits of nearby celestial bodies. Smaller asteroids may be captured by Jupiter’s gravity, while others may be ejected from the solar system entirely. Such interactions highlight how gravitational selection not only shapes the initial formation of celestial bodies but also governs their long-term behavior and interactions.On a larger scale, gravitational selection plays a critical role in galaxy formation and evolution. Galaxies are composed of billions of stars, gas, and dark matter, all held together by gravity. The gravitational pull of a galaxy's core can attract surrounding matter, leading to the growth of the galaxy over time. Additionally, gravitational selection can influence the fate of individual stars within a galaxy. Stars that are more massive tend to have shorter lifespans, ultimately ending in supernovae, while smaller stars may persist for billions of years. This selective process contributes to the overall diversity of stellar populations within galaxies.Furthermore, gravitational selection has implications for the search for extraterrestrial life. The positioning of planets within their solar systems, influenced by gravitational forces, determines their potential habitability. For example, planets located within the 'Goldilocks zone'—the region where conditions may be just right for liquid water—are often the result of gravitational selection. Understanding how gravity shapes these environments can provide insights into where life might exist beyond Earth.In conclusion, gravitational selection is a fundamental concept that underlies many processes in astrophysics. From the formation of planets and stars to the evolution of galaxies, gravity plays a decisive role in shaping the universe. By studying gravitational selection, scientists can gain a deeper understanding of cosmic phenomena and the intricate dance of celestial bodies. As we continue to explore the cosmos, the importance of this concept will undoubtedly become even more apparent, revealing the profound connections between gravity, structure, and the very fabric of our universe.

在广袤的宇宙中，支配天体的力量是复杂而迷人的。一个在科学讨论中出现的概念是引力选择，它指的是重力如何根据天体的质量和与较大天体的距离影响各种天体的分布和生存的过程。这一现象可以在许多背景下观察到，从行星系统的形成到星系的动态。理解引力选择对理解宇宙如何随时间演变至关重要。为了说明这一概念，可以考虑太阳系的形成。在恒星生命的早期阶段，一团气体和尘埃开始在自身重力的作用下塌缩。当这种塌缩发生时，云中的颗粒聚集在一起，形成更大的天体。在这里，引力选择发挥了关键作用；更大质量的物体施加更强的引力，吸引较小的颗粒，导致行星的形成。因此，靠近恒星的行星往往是岩石质和较小的，而远离恒星的行星通常是气态巨星。这种分布直接源于引力选择，因为重力决定了哪些材料可以在每个原行星盘区域内聚集和生存。此外，引力选择还影响太阳系内轨道的稳定性。例如，像木星这样的大行星具有显著的质量，并施加强大的引力。这种影响可以稳定或破坏附近天体的轨道。较小的小行星可能被木星的重力捕获，而其他小行星则可能完全被排挤出太阳系。这种相互作用突显了引力选择不仅塑造了天体的初始形成，还支配了它们的长期行为和相互作用。在更大范围内，引力选择在星系的形成和演化中也发挥着关键作用。星系由数十亿颗恒星、气体和暗物质组成，所有这些都被重力束缚在一起。星系核心的引力可以吸引周围的物质，导致星系随时间增长。此外，引力选择还可以影响星系内单个恒星的命运。更大质量的恒星往往寿命较短，最终以超新星的形式结束，而较小的恒星可能持续数十亿年。这一选择性过程有助于星系内恒星群体的多样性。此外，引力选择对寻找外星生命具有重要意义。行星在其太阳系内的位置受到重力的影响，决定了它们的潜在宜居性。例如，位于“黄金地带”的行星——即条件可能刚好适合液态水存在的区域——往往是引力选择的结果。理解重力如何塑造这些环境可以为我们提供关于生命可能存在于地球之外的地方的见解。总之，引力选择是一个基础概念，支撑着天体物理学中的许多过程。从行星和恒星的形成到星系的演化，重力在塑造宇宙中起着决定性作用。通过研究引力选择，科学家可以更深入地理解宇宙现象及天体之间错综复杂的舞蹈。随着我们继续探索宇宙，这一概念的重要性无疑会变得更加明显，揭示重力、结构与我们宇宙的基本联系。