Big Crunch Theory????????

Question

What is the proof that it is true and meaning of BIG CRUNCH THEORY?

Answer 1

It is a theory and has not been proven yet.

Big Crunch is the opposite of the Big Bang; where the Big Bang is the 'explosion' that started the known universe, the Big Crunch is the ending of the Universe.

The Big Crunch will happen when the expansion of the universe will stop, and all matter will start receding to a central point in the Universe.

However, this recession has not happened yet, and it depends on the amount of matter and energy that is present in the Universe. If dark matter and dark energy truly exist, then the Big Crunch will not happen. That is because the current Universe will meet the requirements in energy and matter to continue expanding indefinitely.

Answer 2

Big Crunch Theory

Answer 3

The "Big Crunch" is the opposite of the "Big Bang" that someday the universe will contract.

This theory came about after the Expansion and contraction theory was disproved in the late 60's. (the theory said the universe was contracting at the time)

The Big bang became the general working theory that is still used today.

This isn't to say that the Big Crunch won't happen, although as we know the universe is still expanding. There is a finite amount of matter in the universe and when all of it expands out to its furthest point, then either the universe will contract or eventually die. (as all of the matter is used up) Now just exactly when this is going to occur is any ones guess.

A bit of background info:

In the 1960's there were 3 different theories about the universe:

Big Bang - expanding universe
Expansion and Contraction - universe was contracting
Steady State - the universe was immobile

Answer 4

Recent experimental evidence (namely the observation of distant supernova as standard candles, and the well-resolved mapping of the cosmic microwave background) has—to considerable surprise—shown that the expansion of the universe is not being slowed down by gravity, but instead, accelerating, suggesting that the universe will not end with a Big Crunch, but will instead expand forever, though some scientists have contested this theory.[1] (The evidence of an accelerating universe has been considered conclusive by most cosmologists since 2002.)

In the framework of the field equations of the General Theory of Relativity, the simplest model of an accelerating expansion corresponds to a positive value of the cosmological constant, which can be attributed to the quantum vacuum itself exerting a force that repels gravitationally on large scales. More generally, the accelerating expansion is attributed to dark energy, which could be the cosmological constant, or a dynamical field with negative "pressure", leading to an effective cosmological constant that could be time-varying. In such cases, it is theoretically possible that the cosmological "constant" need not remain positive, leaving open the possibility of a Big Crunch as the ultimate fate of the universe. A Big Crunch is also still theoretically possible if Einstein's theory of general relativity were found not to apply on large scales. The current evidence neither favors nor rules out dark energy, or modifications of general relativity, of a form that could halt or reverse an eternal expansion; it does, however set lower bounds on the duration collapse (approximately 42 billion years from now, or more than 24 billion years at the 95% confidence level, according to one group led by Andrei Linde).

Answer 5

No scientific theory can ever be "proven". Proofs are for mathematical propositions, not for statements about the real world. This applies to all your questions about the various cosmological theories. Most of those theories (including the Big Crunch), are now thought to be incorrect, based on extensive observations. All surviving cosmological theories are variants of "Lambda Cold Dark Matter Big Bang" theories.

Given the discovery of Dark Energy, it seems unlikely that a Crunch will occur, but since we don't understand Dark Energy very well, it's not impossible that the current exponential expantion would reverse itself sometime in the future and create a crunch.

Answer 6

This is probably meant to build on Big Bang and explain how Big Bang occured.

It is the expanding contracting universe theory or what goes up must come down.

Logically it was the lighter mass that got emitted during the Big Bang.

Cosmic rays, light, X-rays, electrons, protons, etc.

This mass travels at the speed of light.

Heavier mass does not, otherwise, according to Einstein, it becomes lighter mass.

So anything heavier from the core of Big Bang is moving more slowly and we see this with things like Quasars and stars and other galaxies. They move fast, but not at the speed of light.

So, between Newtonian physics and Einsteins postulate that the universe is round and if we move out in a straight line and travel for centuries we eventually return to the Earth where we started out from.

Thus, mass and matter kicked out by Big Bang, if we accept Einsteins view, HAS to return to the point of origin eventually. It's only a matter of time.

Some gravity well or simply the mass at the center of the Universe will eventually decay the trajectory or a star, like our sun and at some point it will fall back towards the center.

This, however, is billions of years away and the only way to PROVE it is to PROVE a given star or galaxy is veering off course to one day stops showing a RED SHIFT (moving away) and starts showing a BLUE SHIFT (moving towards us).

That would be a proof and if several objects did that, it would probaly establish that mass in the universe EXPANDS OUTWARD like a ballon and then shrivels back upon itself due to gravity or trajectory or some force we don't understand.

Finding a singularity or black hole near the center of the universe that is sucking matter backwards might also prove this.

The last bits of matter expelled during Big Bang would move very slowly and be subject to any gravity well nearby after a short period of time. Some of it might orbit for a while, but eventually spiral back to the center.

We have yet to see any of these things.

I'm not so sure the universe is ACCLERATING, that seems to defy the Einstein pricipal that nothing travels faster than light, so if gamma radiation and light were the first things out how can they go faster.

It would seem more like Big Bang gives birth to Steady State or Big Crunch.

We have to remeber Einstein's postulate that you GO in a straight line and RETURN to Earth eventually. Thus we can measure the radiation at the extreme edges of the universe all we want. The question is, DOES IT FALL STRAIGHT DOWN or does it FALL DOWN AND IN AN ELLIPSE. You're OBSERVATION is based on your state of RELATIVITY, from whence you observe that object.

We would have to traverse to the other end of the Milky Way to get two vantage points and triangulate (if you can in Relatavistic space) in order to find out if the triangulations has an error. If it has an error, then we can assume THINGS IN SPACE don't move as linearly as we might think.

Answer 7

Time being a movement of space (our universe's expansion) the big crunch is a possibility!

If the expansion of the universe is a frequency f , time being proportional to 1 divided by f or t=1/f

Our universe might bounce back on itself with a resultant of ZERO!

Jocking? Well kinda!

Read: A brief history of time by Steven Hawkins!

Answer 8

Related to the end of the universe....Universe snaps back and encloses and crunches down on itself. There is no REAL proof. It's all debatable and ........oops. RELATIVE. More study on Black Holes, Worm holes and what they really do(what purpose do they serve) is needing before one could take this theory any more seriously than "Scotty, two to beam up"

Answer 9

i do no longer think of every physique knows what you try to assert, however the huge Crunch thought is obtainable. the belief is that once the huge Bang, the Universe promptly bigger, and certainly remains increasing at present (evidence of it rather is got here upon interior the redshift of celestial our bodies as a effect of them shifting removed from us). the belief is that gravity will decelerate the enhance of the Universe steadily and faster or later a techniques off into the destiny gravity will thoroughly halt the enhance of the Universe and reason each little thing to go returned inwards till each little thing collides in a large Crunch.