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In a closed universe, the expansion will eventually halt and contraction due to the pull of gravity. Check out the 'Electric Universe Model'. It should provide more detailed explanations. Beware! It's a deep subject and one can get lost/confused. Take it slow to groc in fullness. (BTW The Closed Universe Model mostly proven false or highly unlikely.) It is understandable that you are having trouble understanding the closed universe theory since as has already been previously mentioned it is most likely not true. What I think most people struggle to grasp is why the universe can at present be expanding but then this sudden change occur where this expansion is not only halted but reversed. This kind of question rivals questions like why did the Big Bang happen. The truth is we don't really know why this might happen, but it was established as a possible answer since if it were true, we could then explain the Big Bang. It was a solution designed to Dodge a question.
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Wiki User
∙ 15y ago
Wiki User
∙ 13y agoWe do not yet know why the universe is expanding. We cannot even be certain that it is.
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If universe is expanding but mass of sun and planets is not then shouldn't gravity be reduced due to space-time and mass relation?
The answer is that the expansion of the universe is only noticeable over distances of hundreds of millions of light years or more. Over the much smaller distances found within galaxies and planetary systems its effects are negligible.
Why are all distant galaxies redshift?
because the universe is expanding.
How many Earths can fit into the known universe?
The answer is not determinable both because scientists have not determined the exact volume of the universe and because the universe is always expanding.
Will the universe ever begin to contract?
It doesn't seem so. There is evidence that the expansion is accelerating (the Universe is expanding faster than in the past). The reason for this is still somewhat of a mystery; do an Internet search on "dark energy" for more details.
What is the no boundry universe theory?
A "no boundary" universe is a universe where the change in energy is positive or negative everywhere in the universe. Such a universe theory calls for everywhere expansion or everywhere contraction. The current central dogma in Astronomy is for such an expanding universe. The corrected Law of Gravity indicates that the universe is bounded and not expanding.
Why is the universe cooler?
It is because the Universe is expanding.
Why is the univese expanding?
The universe is expanding because of force of big bang.
Since the universe is thought to be expanding why do galaxies collide?
Because although the universe is expanding, the galaxies within it are grouped into clusters. These clusters are still under the influence of gravity, so slowly, over many years, they are attracted towards each other and can collide with one another.
Why galaxies are going far away and the universe seems to expanding?
That's because the Universe really is expanding. It started as a "big bang", where all the matter and energy in the Universe was concentrated in a tiny space, smaller than an atom - at a tremendous temperature and pressure. From there it started expanding, and continues expanding to this day.That's because the Universe really is expanding. It started as a "big bang", where all the matter and energy in the Universe was concentrated in a tiny space, smaller than an atom - at a tremendous temperature and pressure. From there it started expanding, and continues expanding to this day.That's because the Universe really is expanding. It started as a "big bang", where all the matter and energy in the Universe was concentrated in a tiny space, smaller than an atom - at a tremendous temperature and pressure. From there it started expanding, and continues expanding to this day.That's because the Universe really is expanding. It started as a "big bang", where all the matter and energy in the Universe was concentrated in a tiny space, smaller than an atom - at a tremendous temperature and pressure. From there it started expanding, and continues expanding to this day.
Observation of the red shift of galaxies suggest that the universe is what?
Expanding Or that the light is exiting a gravity hole (star).
Do you agree that the universe is expanding because of black holes?
No.
If universe is expanding but mass of sun and planets is not then shouldn't gravity be reduced due to space-time and mass relation?
The answer is that the expansion of the universe is only noticeable over distances of hundreds of millions of light years or more. Over the much smaller distances found within galaxies and planetary systems its effects are negligible.
Can the sun have gravity?
yes because eveything in the universe have gravity
Why are all distant galaxies redshift?
because the universe is expanding.
How many Earths can fit into the known universe?
The answer is not determinable both because scientists have not determined the exact volume of the universe and because the universe is always expanding.
Is the universe large?
at this point in time we cant claculate the size of the universe, this is because we dont have the technology to do so and because the universe is constantly expanding as you read this.
Will the universe ever begin to contract?
It doesn't seem so. There is evidence that the expansion is accelerating (the Universe is expanding faster than in the past). The reason for this is still somewhat of a mystery; do an Internet search on "dark energy" for more details.
