How wide is the universe?
How wide is the universe, in billion light years?
- Anonymous1 decade agoFavorite Answer
Every point in our universe observes itself to be the oldest and most centralized point within the singularity - every point in the universe looks back in time at the BB event with the same relative perspective.
The origin point of the singularity (the BB event when time started expanding) is about 46.5* billion light years away in every direction in our 13.7 billion year-old universe. This counter-intuitive observation is due to the fact that new time and space is continuously being created within the singularity everywhere at once. The origin point of the universe has receded beyond our observable horizon; and note that every other point in the universe shares this same observed perspective.
To illustrate how this can be, I have a new and "improved" balloon analogy:
Picture our singularity universe as a balloon; you are a point in the center of the balloon and the wall of the balloon represents the BB event (the start of time). When you inflate a balloon, you blow the air in at a single point; in our singularity balloon universe, the air (time and space) is being created around every point at once - our universe has inflated beyond the volume that its mere age can account for.
And keep in mind that although there is no such thing as an "outside" to our singularity universe, there is no reason why an infinite number of singularities couldn't exist - just something to ponder...
The universe is incomprehensibly simple!
* If the radius of the universe is 46.5 billion LYs, then the diameter would be 93 billion LYs. Although this is currently a widely accepted figure, it is subject to change as our knowledge grows more precise.
- AlexisLv 71 decade ago
Latest estimates place it at about 90 billion light-years in circumference. That would make it 45-billion light-years wide, from one end to the opposite end.
We don't know whether this is a completely accurate assessment. It's just our best guess at this point until we have a better means of determining its actual size.
- @lecLv 41 decade ago
That's like asking how wide is the surface of the Earth.
- Elizabeth HLv 71 decade ago
at least 156 billion light-years wide. the universe is still growing outward in every direction.
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- AthanatophobosLv 71 decade ago
We don't know. We can't see all the universe.
- Anonymous1 decade ago
Well, it is always expanding. The day it stops expanding we will all feel a big push back. All the planets will be pushed in because they are used to the expantion.