radius of the universe

Thanks for the confirmation...@pela Indeed, there are many red flags which would make one suspicious of this paper's conclusions. In the very early universe (and much less nowadays) spacetime itself was expanding. Radius of Observable Universe – Part 2; 5. Detailed answers to any questions you might have

The universe itself is about 10Modern science says that the known universe extends about 10 billion light years in all directions, and consists of 200 billion galaxies. No. Anybody can ask a question No one knows exactly how big the universe actually is, or how far it extends. The size of the bit we can see has a radius of 13.75 billion light years and we have observed a galaxy right on the edge of this bubble. In "intuitive" rather than precise scientific terms, points that might have been reachable by light from each other in moments suddenly found themselves so distant that light needed immense amounts of time to travel between them. Basically it's everything that is around us. Hubble's Law; 10. These numbers, however, are only of the known universe. Discuss the workings and policies of this site It only takes a minute to sign up.According to the Wiki on the Rs, the Rs of the observable universe is 13.7BLY.Can someone please explain this to me... Is this simply because to get into the non-observable portion of the universe, you have to go faster than the speed of light? ** Hence this means there's a practical "radius" or limit to what we can hope to observe, set by the speed of light itself - called the observable universe.Thanks for contributing an answer to Physics Stack Exchange! Physics Stack Exchange works best with JavaScript enabled If we use the radius of the observable universe as 6.62251133080656x10e22 km and the mass as 3.35x10e54 kg (source ) as values for the calculation of gravitational acceleration and of escape velocity, we get these results : 5.1x10e-8 m/sec2 and 2598533 km/s. Radius of Observable Universe – Part 3; 6. According to some calculations that I have made, it seems that the universe we know is in fact a black hole. The Universe was once just the radius of the Earth-to-the-Sun, which happened when the Universe was about a trillionth (10-12) of a second old. Imagine the Universe! ** Suddenly, points in space that were "close together" (in some sense) became trillions of trillions of times more distant in a very short time. The radius of the observable universe is about 47 billion light years, much more than the age of the universe multiplied by the speed of light. probably_someone is still being kind ... the paper's author does not seem to understand even the basics of Einstein's formulation of general relativity ... the OP should just ignore this paperIt did not make any sense to me either which is why I posted the question. It was a change to the actual geometry of spacetime itself. A Universe Smaller than the … Cosmic Background Radiation – Part 2; 9. But how big is it?The large magnitude of the universe is unimaginable to us humans. For example, they won't be valid when space is rapidly expanding.
According to the theory of cosmic inflation, the entire universe’s size is at least 10^23 times larger than the size of the observable universe. Special relativity is the principle / natural law which says that nothing can travel (no known type of signal can propagate) faster than the speed of light. Cosmic Background Radiation – Part 1; 8. The Size and Shape of the Universe. Radius is the measurement from the center of an object to the edge of it. 10 billion light years: Butterworth, Paul. The equations that determine when collapse happens, which we can apply in the current universe, are based on assumptions and approximations that just wouldn't be valid in the conditions of the early universe.The other issue going on, is the observability and horizon of our universe, which is for a completely different reason. As such, it didn't have a limit to its speed. NASA. Measuring the Size of the Universe. Red Shift; 7. To see how big the universe is, take this into perspective: the diameter of the entire solar system is about 8,000 million kilometers. But special relativity applies to propagation within spacetime. This means it can take light approximately 20 billion years to cross from one side of the universe to the other. Start here for a quick overview of the site In other words, due to the Universe's expansion and the presence of dark energy, 97% of the observable Universe is already unreachable, even if we left today at the speed of light. The radius of the visible Universe is estimated at 1.7e26 m (18 thousand million lightyears) plus or minus 20 percent or so. Stack Exchange network consists of 177 Q&A communities including

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