Big Bang Theory (scientific model)

The Big Crunch

The matter within our Universe causes the expansion of space to slow down, stop, and then reverse itself. Eventually space returns to a much smaller size, taking matter with it. All matter eventually becomes as dense as it was at the time of the Big Bang.

The Big Freeze

Stars and galaxies become so separated from each other that stars can no longer re-form from the remnants of super-nova. All stars end up as white dwarfs, neutron stars, and black holes. Eventually these all die out, leaving a Universe as nothing but collections of inert hydrogen and helium.

The Big Rip

The expansion of space speeds up until all matter -- even protons and electrons -- are torn apart from each other. Every single sub-atomic particle in our Universe becomes separate from every other one; in effect existing only by itself.

Multiverse Collisions

This hypothesis depends on the existence of an infinite number of universes other than our own, each expanding within a multi-verse. Since some universes are matter and some are anti-matter; the inevitable collision of such universes will release enough energy to start a new Big Bang an new universe.

Edwin Hubble, using the Hubble telescope, is credited with the discovery that the distances to far away galaxies were generally proportional to their redshifts (as in the doppler effect); an idea which was originally predicted by Lemaître in 1927. Hubble's observation was taken to indicate that all very distant galaxies and clusters have an apparent velocity directly away from our vantage point: the farther away, the higher the apparent velocity.

Other supportive evidence for the big bang Theory - Cosmic Microwave Background Radiation has been discovered and it is suggested that this has been left over from the Big Bang and galactic clusters are still moving away from each other at an ever increasing acceleration.

Jesuit priest Georges LeMaitre was, in 1927, the first to mathematically detail a cosmology now known as the Big Bang.

The consensus for modeling cosmology was agreed upon based on the work of four scientists: Alexander Friedmann, Georges Lemaître, Howard Percy Robertson, and Arthur Geoffrey Walker. Occasionally referred to as the FLRW, FRW, FL, or RW (e.g., a complete or partial combination of their last initials) Universe, it presents a metric used to explain Einstein’s field equation of general relativity and thus became the foundation for the currently understood version of the standard ‘Big Bang Theory’.

Yes, that is correct. The radiation generated by the Big Bang is called the cosmic microwave background (CMB). As the universe expanded and cooled over billions of years, the high-energy radiation transformed into lower-energy microwaves. Today, the CMB is detected as a faint glow of microwaves that permeates all of space and provides crucial evidence for the Big Bang theory.

It is the theory that the current universe started with a "big bang". To understand how the theory arose, it has been observed that the universe is expanding. If you imagine time going backwards, then the further back you go, the smaller the universe gets, at some point the universe is so small it is a singularity.

The big bang theory predicted that there would be a background noise from the explosion still detectible in deep space; the noise was detected - in fact, it's a problem in radio astronomy that there is always noise present.

On the seventh day God rested. We then just expanded that idea and we still are, ie: three day weekend or four day work week.

In much the same way that you tune your radio to listen to your favourite music, radio astronomers can tune their telescopes to pick up the radio waves that come from quasars, other distant galaxies and the cosmic microwave background that are millions of light years from the Earth.

Feudalism emerged from a need for cavalry troops in Japan and Europe. The infrastructure was not in place to actively pay for these troops so a system was devised to grant land and hereditary rule as compensation.

The main idea is that everything that currently exists in the Universe - including space itself - was concentrated in an extremely hot and dense state; then it expanded into what we have now. It is quite clear that the Universe is still expanding.

Singularity is when strong AI occurs everything will be possible thanks to that AI. It will improve itself recursively until it is the ultimate intelligence and influences the world in the best possible way. It will be greater than in Futurama. We will be immortal and continually evolving, expanding throughout the universe. Experts think it could only take about 9 years, when we really really try. But a more realistic date for Strong AI is about the 2040's or 2050's. See more on the page of the Singularity Institute for Artificial Intelligence -> www.singinst.org. Universal Darwinian algorithm applies to all replicators. The gene machine is a replicator and was the cause of all life on earth with the exception of Homo Sapien Sapien. When our ancestors were able to mimic each other a new replicator was born and humans evolved with two replicators (gene machines and meme machines) in a symbiotic relationship giving rise to large brains and language. Soon a third type of replicator will evolve 'techno-memes machines' or 'teme machines' also known as Artificial intelligence. Each replicator is faster than the previous and the universal darwinian algorithm evolves at an exponential rate (check moores law). The time period when the rate of evolution is too fast for meme machines to keep up with the teme machines is the phenomenological singularity. There is a gradual merging of biological and non biological life and the resulting posthumans exists at new evlutionary level. Probably much more advance to us than we are to mice.

Apart from what we don't know?

The one thing we don't know, is when a supernova is going to happen. It may be tomorrow, or the year after or next century.

A bit like asking when is the next earthquake.

Unanswered questions concerning the Big Bang:

1) What drove the initial expansion of space?

2) Why did inflation stop?

3) What existed before the start of expansion? And does the word "before" have any meaning if there is no time?

Right after the big bang happened, the universe was expanding at a speed of light. While it was expanding, it started to cool itself down since the big bang caused the universe to heat up to ridiculous temperature.

the theory states that atoms formed during the big bang (like right as the big bang happened)

Protons and neutrons were allowed to form about one second after the Big Bang.

Electrons joined to nuclei to form permanent atomic bonds about 377,000 years later.

If you are refering to the Cosmological Argument for the Existance of God then the cosmological argument would go something like this.

1. Whatever begins to exist has a cause

2. The universe began to exist

conclusion. The universe has a cause

Someone using this argument would say that the universe began with the big bang which is largely accepted by scientists, so if this argument is sound, then they must accept that the universe has a cause, and thus a causer (creator/God)

It is a show. I don't recommend for children thought. May be good for adults.

The Big Bang Theory present the theoretical premise for the causation, termination, and continuation of an evolutionary expansion of the universe. The Big Bang Theory promotes four concepts for consideration:

1. that the observable universe is Time bound (or has a finite existence)

2. that the observable universe is expanding (within the dimensional limits of Space and Time),

3. that the observable universe is evolving a set amount of matter and energy while it is expanding over time, and

4. that the observable universe is homogeneous and isotropic with respect to Space and Time.

However the wording for this answer may vary dependent on the classroom objectives.

BIG Bang is a hypothesis and on the basis of cern research big bang theory was proposed.

It probably is! And here we are.

Really, we can't know for sure. It is a theory, meaning that it is a idea. (Sorry,an idea is just an idea; a hypothesis is an idea which can be tested; a theory is an idea which has been tested and (so far) has been confirmed to (probably) be correct.

[If a person chooses to believe in the Big Bang Theory, then that is a matter of opinion.] There is no way to know... for sure ... about anything.

Fortunately, the Big Bang CAN be tested. If the matter in our Universe has been expanding at a (fairly) constant rate since about 13.7 billion years ago, then we would observe the following:

1) Distant galaxies would all be seen as moving away from us, and the rate at which they are receding would be proportional to the distance from us.

2) The calculation of when all galaxies began this expansion -- but working backward to when matter would be lumped together -- would be about 13.7 billion years.

3) Microwave radiation with a black-body spectrum of about 3.7 degrees Kelvin would be seem coming towards our Earth in a perfect isotropic manner.

4) Old galaxies would not be seen at distances greater than a few billion light-years distance.

4) White dwarfs, whose life-span is about 100 trillion years, would not be observed older than 13 billion years.

5) The ratio of hydrogen to helium in all parts of our Universe would be about four to one.

6) Ratios of hydrogen to deuterium would also be within a specific range.

7) Ratios of certain isotopes, whose half-life is in billions of years, would be in a narrow, specific range to their decay products.

ALL of the above HAVE been observed. Proponents of all other hypotheses about our Universe are reduced to saying, "These are things we just observe, but I have no explanation for them."

If Newton was correct that gravity acts like a force that depends on the mass of two objects and the inverse square of the distance between them, then we would observe planets moving about our Sun in eliptical orbits -- which we do. Perturbations of these orbits would need to be explained by other planets moving around our Sun -- and predictions of the size and locations of such planets, based on Newton's ideas, match PERFECTLY with the planets seen by astronomers.

We can either conclude that Newton was correct, OR we can shrug our shoulders and say "If a person chooses to believe in the Newton's Gravity Theory, then that is a matter of opinion. There is no way to know... for sure ... about anything." I think that the former approach is a far more intelligent one.

And I'll say the same thing about the Big Bang.

If you've had to ask this question then you aren't ready yet.

Bigbang theory is when gigantic explosion called bigbang happened and the star created.

For the same reason that any theory is disputed. Some people do not agree that the evidence put forth by theorists supports the generally accepted conclusion. The Big Bang theory speculates that our universe came into being as a result of a sudden and rapid expansion of material out of a tiny and unimaginably dense core of energy. Some people conclude that the evidence/information is itself flawed, and/or they represent serious mis-interpretations of observed phenomena. Others might come to different conclusions based on the current evidence, and still others may draw more assurance from faith-based or non-scientific approaches to knowledge.

The Big Bang (possibly a misnomer; there was no sound according to some theorists) is one way to make sense out of the current observation that the galaxies are moving away from one another. Briefly, if the galaxies are moving away from one another, there must have (theoretically) been a time when they were all bunched up together. The theory also describes how various particles and then atoms came into existence, followed up by the creation of heavier and heavier elements in the various generations and explosions of stars

the big bang theory was found by george gamow

First of all, the Big Bang was NOT an explosion; certainly not an explosion of dense matter into empty space.

Secondly, all observational evidence points to the expansion having begun about 13.7 billion years ago.