black hole

简明释义

1. 坍缩星; 2. 太空里洞;

英英释义

例句

1.Astronomers use telescopes to study the effects of black holes on nearby stars.

天文学家使用望远镜研究黑洞对附近恒星的影响。

2.The scientist explained that a black hole is formed when a massive star collapses under its own gravity.

科学家解释说，黑洞是在一颗巨大的恒星在自身重力作用下坍缩形成的。

3.Many theories exist about what happens inside a black hole.

关于黑洞内部发生什么的理论有很多。

4.The new software update turned out to be a black hole, causing more problems than it solved.

新的软件更新结果成了一个黑洞，引发的问题比解决的问题还多。

5.In financial terms, that project was a black hole for our budget, consuming resources without any return.

在财务方面，该项目对我们的预算来说是一个黑洞，消耗资源而没有任何回报。

作文

In the vast expanse of the universe, there exist mysterious entities known as black holes. A black hole is a region in space where the gravitational pull is so strong that nothing, not even light, can escape from it. This phenomenon occurs when a massive star collapses under its own gravity at the end of its life cycle. The concept of a black hole is not only fascinating but also crucial for our understanding of astrophysics and the nature of the universe. The term black hole was first coined in the 1960s, but the idea has roots that go back much further. Scientists like Albert Einstein and Karl Schwarzschild laid the groundwork for the theoretical existence of black holes through their work on general relativity. Initially, the notion of a black hole was met with skepticism, as it challenged the traditional views of physics. However, over the decades, numerous astronomical observations have confirmed their existence, making them a cornerstone of modern cosmology.The formation of a black hole typically begins with a massive star exhausting its nuclear fuel. As the star runs out of energy, it can no longer support itself against gravitational collapse. The core implodes, leading to a supernova explosion, while the outer layers are expelled into space. What remains is an incredibly dense object, and if its mass exceeds a certain limit, it becomes a black hole. The boundary surrounding a black hole is known as the event horizon, which marks the point of no return. Once anything crosses this threshold, it cannot escape the black hole's grasp.There are different types of black holes, categorized primarily by their mass. Stellar black holes form from individual stars and typically have a mass between three and several tens of solar masses. Supermassive black holes, on the other hand, reside at the centers of galaxies and can contain millions or even billions of times the mass of our Sun. The Milky Way galaxy, for instance, is home to a supermassive black hole known as Sagittarius A*, which has a mass approximately four million times that of the Sun. The study of black holes has far-reaching implications beyond just understanding cosmic phenomena. They challenge our notions of time and space, leading to intriguing questions about the fabric of reality itself. For example, the idea of singularity—where density becomes infinite—forces physicists to reconcile general relativity with quantum mechanics, two fundamental theories that describe the universe at large and small scales, respectively.Moreover, black holes play a critical role in the evolution of galaxies. Their immense gravitational forces influence the motion of stars and gas clouds, shaping the structure of galaxies over billions of years. Some theories even suggest that black holes could be portals to other universes or dimensions, although these ideas remain speculative.In conclusion, black holes are not merely astronomical oddities; they are essential to our understanding of the universe. They embody the mysteries of space and time, pushing the boundaries of human knowledge. As we continue to explore the cosmos, the study of black holes will undoubtedly provide deeper insights into the nature of reality and the fundamental laws that govern our universe.

在宇宙的广袤空间中，存在着被称为黑洞的神秘实体。黑洞是一个在空间中的区域，其引力强到连光线也无法逃脱。这一现象发生在一颗巨大的恒星在其生命周期结束时因自身重力而崩溃。当一颗巨大的恒星耗尽其核燃料时，黑洞的形成通常开始。随着恒星能量的枯竭，它就无法再抵御重力的崩溃。核心部分会发生内爆，导致超新星爆炸，而外层则被驱逐到太空中。留下的就是一个极其致密的物体，如果其质量超过某个极限，它就会成为黑洞。围绕黑洞的边界被称为事件视界，标志着无法返回的点。一旦任何东西越过这一阈值，它就无法逃脱黑洞的控制。黑洞有不同类型，主要根据其质量进行分类。恒星黑洞是由单个恒星形成的，通常质量在三倍到数十倍太阳质量之间。而超大质量黑洞则位于星系中心，可以包含数百万甚至数十亿倍太阳质量。例如，银河系的中心有一个名为人马座A*的超大质量黑洞，其质量约为太阳的四百万倍。对黑洞的研究不仅仅局限于理解宇宙现象。它们挑战了我们对时间和空间的观念，引发了关于现实本质的有趣问题。例如，奇点的概念——密度变得无穷大——迫使物理学家将广义相对论与量子力学结合起来，这两种基本理论分别描述了宇宙的大尺度和小尺度。此外，黑洞在星系演化中扮演着关键角色。它们巨大的引力影响着恒星和气体云的运动，塑造了数十亿年的星系结构。一些理论甚至建议，黑洞可能是通往其他宇宙或维度的门户，尽管这些想法仍然是推测性的。总之，黑洞不仅仅是天文学的奇异现象；它们对于我们理解宇宙至关重要。它们体现了空间和时间的奥秘，推动着人类知识的边界。随着我们继续探索宇宙，对黑洞的研究无疑将为我们提供更深入的见解，揭示现实的本质以及支配我们宇宙的基本法则。