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The evidence to date suggests something on the order of 25 - 30 billion light years in diameter.

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This question doesn't make any sense because your question means like if you are asking about how much a car had traveled which started travelling billions years ago. So the appropriate answer to this question is that universe is increasing its size day by day and it will never stop, so there is no limit.

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11y ago
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13y ago

Even if you were in space you are still in the universe. Your view would depend on what you are looking at, be it stars, planets, comets, which are all part of the universe.

Presuming we are looking at known matter it resembles three fanned out planes (Trinity?) with the apexes within a 180 degree angle. Watch this video (you can jump to 19 min. 24 sec.) for the image: http://www.hischannel.com/BackQ/9000/9004/.php This is a still shot: http://www.inetmatrix.com/images/universe.png This of course is based on the video's conception of astronomy.

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11y ago

If you give the size of the universe a number, would be an unwise decision . The

Universe does not have a size , but it has a shape where space is expanding each day . The Universe is so big in size, that it can accommodate as many galaxies you can possibly think off. If we have the most powerful telescope and we want to observe the most distance body within our universe , we will not be able to measure this distance between the earth and this far away body. Why, because with current human technology we are not able to observe the area near the edge of the universe . We need to develop new technology to map our universe , this is very important because by doing this we can explain why the galaxies are accelerating in speed, those that are far away from us .

The size of the universe is only as big as we can think off .

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13y ago

Through sheer estimate and inference science based upon theories such as the Big Bang.We really don't know the size of the universe, we only know the extent of it based on current theories.

Scientists as a community don't know the size of the Universe. My own theory puts the size at 158 E24 meters or 16 Billion light years away.

Actually the size of the known universe is estimated at 97 billion light years in diameter.

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11y ago

Answer 1

There was no universe before the Big Bang, and we need to explain that a bit. The Big Bang brought with it spacetime, which is the fabric or the "space" that is the volume of the universe. It isn't like there was a big empty universe that the Big Bang filled with "stuff" after it appeared. The origins of the universe in the moment before the Big Bang can only be guessed at. The point is that there wasn't a universe before the Big Bang; the Big Bang created the universe itself, and all the things in it appeared in time. The universe, the spacetime that is its fabric and defines its volume, is still expanding today, by the way.

Answer 2

We can never see the Big Bang or what happened around that time, because photons were not free to travel through the universe yet.

Mathematically speaking, the universe was at a singularity which has no size. The Heisenberg uncertainty principle dictates that the universe may have been created in a volume of zero, which means there was nothing measurable in existence. A quantum fluctuation caused an instability which accelerated the energy outward, causing the expansion we see today.

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10y ago

Mathematically speaking, singularities are infinitely small and have no size or volume.
The Heisenberg uncertainty principle dictates that all of the matter and energy may have been in a volume of zero. This means that effectively there is nothing measurable there.

Note: The analogous expression of the pre-Big Bang singularity as a conceptual mass (or matter) with size, density, and time at the beginning of SpaceTime (i.e. extremely small) is irrelevant due to the evolving dimensional unfolding of the singularity. Therefore the concept that "singularities are infinitely small and have no size or volume" is a consideration of it perspective within our traditional fourth dimensional SpaceTime continuum.Such asingularity is defined as that dimensional condition which ingratiatiated the entirety of our universe (the four combined forces of nature; strong nuclear, weak nuclear, electromagnetic and gravity). Therefore the concept of size has no meaning within this singular event known as the Big Bang. It is expected that all of the matter and energy retained for our universe was provided upon this singular event. While the amount of this combined retainment is inviolate, the distingusihable forms of matter and energy evolved from moment to moment.

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11y ago

Depends on a, your point of view and b, what light your using I.e if your looking in the microwave spectrum then about 14.2 billion years using a the WASP cosmic microwave background detector. If you mean actual eyesight then it's obviously a lot less

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14y ago

The observable universe is about 13.7 billion light years from end to end, but it is estimated that theactual universe has a diameter of 156 billion light years, with a radius of 78 billion light years and a circumference of 312 billion light years Answer 13.7 BLY is wrong that is the age of the Universe and it has been expanding exponentially ever since... The comoving distance from Earth to the edge of the visible universe (also called particle horizon) is about 14 billion parsecs (46.5 billion light-years) in any direction. This defines a lower limit on the comoving radius of the observable universe, although as noted in the introduction, it's expected that the visible universe is somewhat smaller than the observable universe since we only see light from the cosmic microwave background radiation that was emitted after the time of recombination, giving us the spherical surface of last scattering (gravitational waves could theoretically allow us to observe events that occurred earlier than the time of recombination, from regions of space outside this sphere). The visible universe is thus a sphere with a diameter of about 28 billion parsecs (about 93 billion light-years). Assuming that space is roughly flat, this size corresponds to a comoving volume of about 3×1080 cubic meters. Many secondary sources have reported a wide variety of incorrect figures for the size of the visible universe. Some of these are listed below. * 13.7 billion light-years. The age of the universe is about 13.7 billion years. While it is commonly understood that nothing travels faster than light, it is a common misconception that the radius of the observable universe must therefore amount to only 13.7 billion light-years. This reasoning only makes sense if the universe is the flat spacetime of special relativity; in the real universe, spacetime is highly curved on cosmological scales, which means that 3-space (which is roughly flat) is expanding, as evidenced by Hubble's law. Distances obtained as the speed of light multiplied by a cosmological time interval have no direct physical significance.
78 billion light yrs wide

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11y ago

The current cosmological understanding is that space "expands" based on the matter placed into it. There is no way to determine a finite maximum size (volume).Note :

It is important to know that the universe can get bigger, but it has a limit . This limit is not yet explore by the human race.

There will be a day where we can map the universe and this will explain many

question we have like how big can the universe get .

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13y ago

The diameter of the observable Universe is approximately 140Ym (Yottameters) or 14,000,000,000 light-years. However, the total Universe is assumed to be 930Ym, this is a very general estimate since we can't see this far and since the Universe is always expanding.

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Q: What does the universe look like on very large scales?
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