Curvature Stories

In this article, we will examine the controversial notion that gravity is not a force itself, but rather a manifestation of the curvature of space-time caused by the presence of mass and energy. We will explore the foundations of Einstein's theory of general relativity and how it challenged our traditional understanding of gravity. Furthermore, we will investigate alternative theories that regard gravity as an illusion, arising from quantum phenomena or as a side effect of other fundamental forces. Through evidence, experiments and debates in the scientific community, we will reflect on the future of research and the possibility of a new understanding of gravity. Get ready to question your previous knowledge and embark on a fascinating intellectual journey into the very nature of gravity in our universe.

It is a memoir that depicts the history of human civilization hundreds of years into the future. In the next hundreds of chapters, Orion guides humanity towards the stars. How would you feel if someone said to you that our earth, our solar system, our galaxy, our universe is in a black hole? Would it feel like nonsense? No, don't be in a hurry to dismiss it yet. Because there is a very scientific calculation that can change your view. The total mass of the universe is roughly estimated to be 1.45*10^53kg, note that this figure is a rough estimate, and the actual mass is likely to be greater than this. And the formula for the Schwarzschild radius of an object is Rs = 2GM/Vc^2. In this, G is the universal gravitational constant, M is the mass of the object, and Vc is the speed of light. The gravitational constant, G, is then equal to 6.67*10^-11. The speed of light is roughly 3*10^8 metres per second. Thus, Rs = 2.15*10^26 metres. It's roughly considered 2.27*10^10 light years. That means that the Schwarzschild radius of the universe is 22.7 billion light years, which is very close to the radius of the universe, 46 billion light years, on a cosmic scale. The radius of the Earth is about 6,371,393 metres, which is much larger than the Earth's Schwarzschild radius - 8.8 mm, according to Wikipedia. What does it mean that the Earth's radius is less than the Schwarzschild radius, which would turn the Earth into a black hole, and thinking about that the radius of the universe is so close to the Schwarzschild radius of the universe? What if the real mass of the universe was even larger? Does it mean that ...... our universe is also a black hole? Could it be that all of us, our universe, is inside a giant black hole? So, what could be beyond this black hole? Is it true that every black hole in our universe contains a whole new universe that is very different from ours? No one can answer.