what's the universe expanding theory all about?

Answer 1

The expanding universe theory is the most accepted theory on the origin of the universe, as we know it. The key concept is called the Big Bang, which formed the universe.

One moment at the start of time all matter and energy in the universe was concentrated at one point, not a spot, or a circle, but a single point smaller than an electron. This was an unstable condition and what we call the Cosmic Egg exploded. Every since that explosion the pieces of the universe have been rushing away from the original point at an every increasing speed. Which is somehow caused by the action of dark energy and dark matter. The explosion of the cosmic egg is known more popularly as the Big Bang.

A one time muleskinner and astronomer named Hubble discovered that every body in the universe (except those locking in orbit around the sun) are moving away from some point. This famous discovery by that man is considered one of the most important discoveries in modern astronomy and the Hubble Space Telescopic is so named in his honor.

A couple of engineers from AT&T were working with microwaves and a huge antenna horn. They got some interference and couldn’t explain why. Eventually they found out that the extra interference was radiation left over from the big bang. This discovery was very important because it confirmed the idea of the Big Bang, which is the fundamental concept of the expanding universe theory.

Astronomers have a problem; most of the universe is missing. Whenever they calculate the amount of energy and mass in the universe they come up short, by less than 50%. For a long time they had no idea what was causing this. The theory to explain it was that there had to be some sort of invisible matter and energy in the universe, called dark matter and dark energy. Up until 2006 the theoretical existence of dark matter and dark energy was considered a dirty and almost silly concept; a fudge factor to explain why the formulas didn’t work right. Finally, a source of dark matter occluded a star and theory became fact. Up until this point the end of the universe was not known.

There are two ways that the universe can end. First it can expand out to nothing with the pieces moving farther and farther apart until all the suns die and the particles of the universe are flung out so far and wide that we cannot conceive it. Or black holes, like the one at the center of the Milky Way, will suck in all the matter in the universe; combine to from one super black hole which would then become a new cosmic egg. Each theory held equal weight until the discover of dark energy and the discovery that black holes are not so black after all. A black hole gives off radiation known as Hawking Radiation, named for Steven Hawking who proposed the theory. Since black holes do radiate and since dark energy and dark matter exists we now know the eventual fate of the universe. It will continue to spread to infinity.

Another concept that the expanding universe theory brings up is the limit to the universe. The universe is said to go on forever, and indeed the empty space around it does, but the universe itself has a limit. It all started at one point and then it spread out at a speed lower than the speed of light. This means there is an edge of the universe some uncalculable distance away. There are parts of the universe at this edge and the light given off by them expands out, at the speed of light, even further. So the universe is immense, but it does have its limits.

Answer 2

It's not a theory. It can be directly observed through the red shift of wavelengths of light from distant objects. Also, Einstein's own equations showed that the universe could not possibly be standing still. He refused to believe it and put in a "fudge factor" into his equations to make the universe stand still. He admits it was the biggest mistake he ever made.

Space has expanded from time zero and continues to expand. Not the stuff in space, but empty space itself is expanding. If you find this hard to picture, you are not alone. There are some great books on cosmology, I will cite a very popular, easy to read book, if you like reading, by Tim Ferris. He has also made some TV specials for programs such as NOVA, but his books are much more interesting.

Answer 3

About the fact that the universe had a beginning around 13 billion years ago, and that the rate of expansion seems to be increasing.
It is less a theory than an observation.

Answer 4

it is so some distance an theory. even if if the universe greater advantageous from its commencing up and keeps to be expandable it is not yet shown to nonetheless be increasing. Its "obvious" or "observable" increasing fee could be an optical phantasm produced via the action of gadgets in area, purely as rolling clouds around the sky seem shifting faraway from the earth at a distance while they are extremely purely rotating around the earth. issues shifting faraway from different gadgets would not continually advise there is an increasing of area between them.

Answer 5

The Universe was at a great Vacuum expansion and settled at a Massive Universe resting at -0 Vacuum..The Universe is already at Maximum vacuum expansion rate..But it can create greater vacuum rips or black holes within of a smaller space...
( Teach someone else what you just learned ) Tell em where you got it !

Answer 6

Its quite a strong theory, basically we can tell that radiation sources (stars) in the universe are moving away from us because of the frequency of light that arrives at earth. Like the way when an ambulance drives away from you its siren sounds like it is becoming lower and lower pitched.

Answer 7

to put it simply, it says that the universe is expanding

Answer 8

http://discoveries.typepad.com/my_weblog/2007/03/challenged_by_s.html

Answer 9

it has to do with the big bang THEROY not fact