Expanding Universe!!?

Question

I dont understand when i hear "Universe is expanding". What is that in which universe is expanding? Is that also not universe?

Answer 1

The universe expanding is a misnomer. What they really mean is space, all space, is getting larger. If you hold a baseball in your hand, the entire ball is expanding with the universe. The effect is inperceptiable, but if you could hold the ball for about 15 billion years (double the age of the universe) the balll, your hands, everything will have about doubled in size. The density of the ball would likewise have gone down, but not because it expanded like a rising cake - it's because the density of the universe has decreased.

It's not like an explosion - it's like the surface of a balloon as you blow it up. Every cubic bit of space, down to a billionth of a billionth of a millmeter across, is expanding from every other as the entire universe expands. To ask what it expand into is meaningless.

Answer 2

It is asituation to understand! When theHubble telescope began to send back information scientists detected what they call red shifts in the light of galaxies, this indicated that all galaxiesd were moving away from each other, if this was the case, they assumed that at one point all of the galaxies were closely packed togeather. They tracked the paths of the galaxies back to a point in time, 10-43 second, here all of the physical laws broke down, even the famous E=MC2 had no meaning here because the only part of the formular that existed was the E, this could not be quantified because there was no gravity, no time and no mass. To me, the first physical law to appear was thermodynamics when the incedible heat of this point began to flow into the void and matter, space and time came into being. The space began to expand at a horrific rate and the matter, which, in a way was enbedded in the space, was carried along in the expansion. This matter eventually formed the galaxies which are still embedded in the expanding space. Imagine the dough of a raisin bun, the raisins are in random positions inside the bun but when the bun is baked in the oven the whole thing grows in size, the raisins, galaxies, are still in random positions but they move away from each other as the dough, space, expands. The expansion of the universe is baffling to science, to them it is expanding too quickly from data they have derived about the amount of mass in the universe, they proposed that about 90% of the mass is not obsevable because it is dark, to counteract this unexplained expansion they proposed that dark energy must causing the push of the expansion, they readily admit that if such energy exist they have no idea where it came from. By now you are probably more confused than ever but I hope not. In my opinion the universe is expanding because of the inertia of the original expansion and it will continue to expand until matter is so thinly distruted in space it reachs near absolute zero and nothing will be observable.

Answer 3

Recently, scientists have "discovered" that the Universe is expanding a lot faster than predicted. Supposedly, the Universe and everything inside this "fabric" of space and time is expanding outwards from the point of the beginning of time itself. Many things can happen with this expansion though none of it can obviously be proven. Some think we will burst in the Big Rip like a balloon and others believe it will just continue to expand infinitely. Hope this helps.

Answer 4

About 13.5 billion years ago, the big bang started the Universe. There was no before, as time is merely a measure of the expansion of the universe. As the big bag began, the universe was small, and then expanded outward. It expands by pushing the confines ever further outward. What we are not sure of is if the expansion is never ending, as it is still accelerating, or will stop and expand no further, or begin the great contraction. Short answer, the universe is getting bigger. Therefore, expanding.

Answer 5

You ever listen to a car as it drives by? It sounds, really low in the distance, and as it gets closer the pitch gets higher and higher, until it rushes by, and then gets lower and lower. I'm sure you're familiar. But why does that happen?

It's called the Doppler Effect. When the car is far away, the sound waves get dragged out and have a lower frequency. When the car is close, the frequency is much higher.

Scientists do the exact same thing with galaxies and light. If you imagine a galaxy driving by us, it would appear yellow or orange or whatever color it naturally is. As it gets closer, the light wave frequency increases, making the color appear a few tints bluer. When things get closer, they become a bit bluer, and this is accordingly called "Blue Shift". As the galaxy moves away from us, it will return to it's normal color, and then start turning slightly Red as the wavelength gets dragged out. This is called Redshift.

From Earth, we see that all Galaxies are moving away from us and away from each other. They are all Red shifting, from each other. We can tell that the Universe is expanding. We have no idea into what, though.

You can't really ever tell what's outside of the Universe, which is an answer that physicists don't like, but nonetheless have no choice thus far but to accept. Imagine it as the absence of nothing. Easier? No, it isn't for me either. Nor anyone else on Earth. Don't worry about it, because no one else gets it because we just can't understand it. We just don't understand the concept of nothing not existing outside of something with no boundary for there to be an outside of.

But seriously, don't worry about it. No one else gets it either.

Answer 6

The universe is expanding, but no, there is, supposedly, nothing beyond the universe, just 'the future', for example, the kind of 'future' we will experience 10 seconds from now. It isn't here yet, but it will be. The edge of the universe is expanding into the same thing - nothingness. It will transcend from being classified as 'the future' to being classified as 'the present'.

Answer 7

The universe isn't actually expanding at all. The idea that it does comes from misinterpreting galactic redshifts as a doppler effect when they are actually a scattering effect. The galaxies are not generally receding from each other at all. Their light simply loses energy through it's interaction with the molecular hydrogen that fills intergalactic space:
http://www.newtonphysics.on.ca/universe/

If expanding space was responsible for cosmological redshifts it would cause a reduction in the surface brightness of distant galaxies but we find this is not realized:
http://www.sci-news.com/astronomy/science-universe-not-expanding-01940.html

Also, as well as stretching out the wavelengths of light, expanding space would stretch out the light curves of quasars (their oscillation in luminance). No sign of this either:
http://phys.org/news190027752.html

This documentary may enlighten you:
https://www.youtube.com/watch?v=IFFl9S39CTM There never was a Big Bang.

Answer 8

Don't feel to bad. You are not the only one who has problems with the concept of an expanding universe. Hubble himself felt that there had to be another reason for the observed red-shift of distant galaxies. Unfortunately, I feel that too many people accepted it so easily because it fit in with their own preconceived notions of a finite universe created by God.
Some people just can't grasp infinity, I guess.

Answer 9

"...What is that in which universe is expanding?..."

There's only one answer to your question :: we just don't know! Science has no definite answer, although there are all kinds of notions and ideas, like there's some Mother Universe or parallel universes, etc.,.

Answer 10

there is greater vacuum created as area expands. the completed quantity of count would not replace using fact the universe expands. The mass of the universe is easily decreasing slowly, using fact lots of the difficulty is being "burned up" in stars, and growing to be capability.