Radius of the Observable Universe in Light-years Is Greater than …
2015年12月13日 · The radius of the observable universe is about 46 billion light-years, which is considerably greater than its age of about 14 billion years. The radius of the observable universe is defined by the greatest distance from which light would have had time to reach us since the Big Bang, so you might think that it would lie at a distance of only 14 ...
Is the Universe Finite, or Is It Infinite? - Physics Forums
2024年3月16日 · What is the difference between the “universe” and the “observable universe”? The observable universe refers to the portion of the universe that we can see or detect, limited by the finite time light has traveled since the Big Bang. It has a finite volume. The term “universe,” however, encompasses all of existence and could be finite ...
How many cubic planck lengths are in the observable universe?
2015年5月1日 · The number of cubic Planck lengths in the observable universe is significant because it represents the smallest possible units of distance within the universe. It also shows the immense scale and complexity of the universe, as well as the limitations of our current understanding and technology in measuring and comprehending it.
How does the observable Universe have meaning? - Physics Forums
2020年10月24日 · How does the observable Universe relate to our existence and purpose? The observable Universe is the physical environment in which we exist, and studying it can help us understand our place in the Universe. However, as scientists, we do not assign a specific purpose or meaning to our existence based on the observable Universe.
The Universe vs Observable Universe - Physics Forums
2018年1月28日 · The Observable Universe refers to the portion of the Universe that we can observe, which is limited by the speed of light and the age of the Universe. This means that the Observable Universe is a smaller subset of the entire Universe.
The observable universe, the actual uinverse, and CMB - Physics …
2013年1月18日 · this is essentially or effectively the BOUNDARY OF OUR CURRENTLY OBSERVABLE UNIVERSE. the evidence suggests that there is lots and lots and lots of universe outside that spherical shell. Of course the shell is growing outwards. In a thousand years our currently observable universe will be bigger. But percentagewise it doesn't amount to much.
The observable and non-observable parts of the Universe - Physics …
2019年12月29日 · So the observable universe could have been the size of a grapefruit (or whatever) but it is still one part of the infinite universe. Naive modelling gives us a problem if we go back far enough - the universe remains infinite in size but the observable universe (and every possible observable universe) goes to zero size.
Observable universe and overlapping spheres - Physics Forums
2024年1月25日 · The observable universe refers to the portion of the entire universe that we can see or observe from Earth, given the finite speed of light and the age of the universe. It is limited by the distance that light has traveled since the Big Bang, approximately 13.8 billion years ago, resulting in a spherical region with a radius of about 46.5 ...
The Boundary of the Observable Universe | Page 2 - Physics Forums
2024年11月3日 · Located at a spatial coordinate that is now within our observable universe, sure. But I would say this is essentially using the definition of observable universe discussed in section 3.4 of Davis and Lineweaver, projecting the particle horizon now back in time along comoving worldlines. I think you pointed out this discussion in a now-deleted post.
Diameter of the observable Universe - Physics Forums
2024年7月6日 · The observable Universe is not the entirety of the Universe; it is limited by the speed of light and the age of the Universe, which is estimated to be around 13.8 billion years. Beyond the observable region, the Universe likely continues, but it …