why do people say that the universe is expanding all the time?

Question

all i know is that universe is a never ending thing

Answer 1

Using powerful telescopes and measuring doppler shits, scientists determined that all distant galaxies are moving away from us, and the farther away they are, the faster they are moving.

This is not because all the galaxies hate us - it is because the entire universe is expanding.

Imaging if you had a baloon, and you blow it up just a little big. Now use a magic marker to make a grid of dots a quarter inch apart.
***
***
***

Now blow up the balloon a lot bigger. What do you get?
* * *

* * *

* * *

All the dots move away from all the other dots, due to the expansion.

The universe only seems never ending because it is very big. When you stand on the beach, the ocean looks never ending, but that's just because it is so much bigger than your observational window.

Answer 2

Hello =)

Well, it all depends on how you look at the universe...it's a belief thing...

Do you believe that the universe is housed in an endless "container" of empty space and time, and it's just getting bigger inside this container, which will never run out of room??

or

Do you believe that space and time unfold, along with the matter and energy of the expanding universe??

Since some point in history, long past, the various galaxies have been drifting apart from each other at an INCREASING speed. Whether or not you believe in the "big bang" theory may or may not explain this phenomenon to you. Nonetheless, this is something that we can now measure, with our instruments, so, I would dare say that this is a conventional "truth".

Einstein posited that we could only exist as we are now, if the universe were in a state of expansion, and should that expansion ever cease, or begin contracting, all laws, as we know them, would change. If you took that to the level of absurdity, you could speculate that time would run backward. We would, inexplicably gather at cemataries, dig up the dead, have a ceremony, and bring an old person home, where he would grow younger over time, and ultimately slip inside his mother's womb. That would be the "normal" life cycle of a human in a contracting universe.

Since this is very absurd, we can speculate that life is only really possible in an expanding universe.

I hope this was more helpful than confusing,

--Tom

Answer 3

Think about it, if we have the universe and its round( as gravity would force it to be)then there must be a point at which the universe ends and beyond that? nothing. but it proves that the universe CAN expand as there's space to fill, no there's also the point of why the the distance between distant stars has actually increased over a period of observation; indicating an increase in the "empty space" between them, which of course suggests expansion. now it was supposedly the Big Bang that set the whole thing off, like a bomb would sent a dust cloud in all directions but with nothing to stop that cloud from ever slowing down or stopping because in that emptiness beyond the universe there's nothing there, so therefore nothing to cause friction of any other limiting force.
that's only rough explanation but i hope it helps you grasp the theory

Answer 4

No, universe is not expanding, but it's our viewing capability in the deep space. Distances across the stars and galaxies keeps on changing, but the thought that they are expanding in the universe to fill the empty space (?) after the big bang is baseless. Even Big Bang theory is also baseless. It's just an assumption, because anything we want to start should start from point zero, and we we created the point zero as big bang to start with. The total mass of all matters in the universe cannot be calculated because we are not aware about it. And what was there before the big bang? No empty space to handle the big bang blast? And what was the mass of that object which exploded in the big bang? These are real questions but problem as I said...anything we want to start should start from point zero. No matter where we create that point zero, from where we can calculate further.

Answer 5

Because, for the most part, the galaxies we can observe are moving away from each other. The observable universe is expanding as a result of the Big Bang.

Answer 6

yes the universe is ever expanding .it was hubble who said that and he had good reason too.as u know the universe and the various celestial bodies wer formed hundreds of millions of years ago due to a big explosion known as the big bang explosion.after this explosion the bodies in the universe (which were a single large mass) were separated and due to the energy from the explosionthey have been moving apart and are still doing so.hope i have answered ur question satisfactorily.

Answer 7

I think its something to do with trans fat. lol

Actually if youre into the "BIG BANG" theory, after that big explosion, the universe will expand forever because there is nothing to keep it from doing so.

Answer 8

bcoz edwin hubble telescope proved that universe is expanding....

Answer 9

Do people say that - I have never heard