To put it simply, the answer is no. The universe began as an infinitely dense and infinitely small singularity that began to expand in an unexpected event known as the Big Bang. But this explosion is different from what we see in our daily lives, it is the expansion of space itself, causing everything in the universe to alienate from each other. Current observations show that the universe is largely isotropic, i.e., the universe looks roughly the same no matter which way it is viewed. The galaxies are very evenly distributed in different directions of sight, suggesting that there is no particular direction in the entire universe that is particularly preferred, and also implying that there is no fixed center. 而我们的可观测宇宙则略有不同。它是指自大爆炸以来光能够到达的最远范围，大约138亿年。但这并不意味着地球是宇宙的中心；如果你站在100亿光年远的另一个恒星旁，你的位置对于自己的可观测宇宙来说也是中心。 关于空间的性质，是平坦还是弯曲？爱因斯坦的广义相对论告诉我们，大质量物体会拉伸其周围的时空，形成我们熟知的引力。因此，在细节上，空间会围绕每一个有质量的物体而弯曲。 Mass also has a profound effect on the overall geometry of the universe. The total amount of matter and energy in the universe determines whether it is open, closed, or flat. If the density is equal to the critical density, then the universe is flat, like a piece of paper that stretches infinitely in all directions. If the density exceeds the critical value, the universe will appear in positive curvature, like a closed sphere; Conversely, if the density is less than the critical value, an open, negatively curvature universe is formed, like a saddle. 至于膨胀的宇宙，远离我们的星系以更快的速度移动，导致长度收缩，从我们的视角看来，它们显得更小。威尔金森各向异性探测器（WMAP）的数据表明，可观测宇宙的密度极其接近临界密度，误差仅为0.4%。虽然可观测宇宙只是整个宇宙的一小部分，但我们所能观察到的这个区域看上去非常平坦。 宇宙是空间、时间及其所包含的一切的总和，包括行星、恒星、星系以及其他形式的物质和能量。整个宇宙的具体尺寸尚不可知，但我们能测量到的可观测宇宙直径大约为930亿光年。在某些多元宇宙理论中，我们的宇宙是更大尺度的多元宇宙中分离出来的一个，拥有其自身的空间、时间和内容。 关于宇宙最早的科学理论可以追溯到古希腊和美洲原住民哲学家们提出的地心说，认为地球是宇宙的中心。随后，通过更精确的天文观测，尼古拉斯·哥白尼提出了日心说，将太阳视为中心。艾萨克·牛顿总结了尼古拉斯·哥白尼的工作以及第谷·布拉赫和约翰内斯·开普勒的行星运动观察，最终确立了万有引力定律。